Tag: M.W:100-200

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《The configurational relationships between α hydroxy acids and β-hydroxy acids and between the latter and secondary alcohols》. Authors are Levene, P. A.; Haller, H. L..The article about the compound:(S)-Methyl 3-hydroxybutanoatecas:53562-86-0,SMILESS:C[C@H](O)CC(OC)=O).Name: (S)-Methyl 3-hydroxybutanoate. Through the article, more information about this compound (cas:53562-86-0) is conveyed.

It is proposed to study the relation between β-HO acids, α-HO acids and the secondary alcs. by means of the reactions RCH(OH)CH2CO2Et → RCH(OH)CH2NH2 → RCH(OH)CH2OH → RCH(OH)CO2H; RCH(OH)CH2NH2 → RCH(OH)CH2Cl → RCH(OH)CH2CH2CO2H → RCH(OH)Et; RCH(OH)CH2Cl → RCH(OH)Me. Levo-3-hydroxybutyric acid (J. Chem. Soc. 81, 1402(1902)) [α]D25 -24.5°, in H2O. Me Levo-3-hydroxybutyrate (cf. Fischer and Scheibler, C. A. 3, 2135), b17 70-2°, [α]D20 -20.9°, without solvent. Levo-3-hydroxybutyrylhydrazide, C4H10O2N2, m. 129-30°, [α]D31 -29.3°, in EtOH. sym-Dextro-2-hydroxypropylurea, C7H16O3N2, [α]D26.5 18.5°. Levo-2-hydroxypropylamine-HCl, C3H10ONCl, [α]D26.5 -31.2° in H2O, much less in N NaOH, (the last 3 substances were prepared according to methods of Levene and Scheidegger, C. A. 19, 1128, for inactive compounds). Levo-1,2-dihydroxypropane, from the amine, AgNO2 and HCl.

Compound(53562-86-0)Name: (S)-Methyl 3-hydroxybutanoate received a lot of attention, and I have introduced some compounds in other articles, similar to this compound((S)-Methyl 3-hydroxybutanoate), if you are interested, you can check out my other related articles.

Reference:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: (S)-Methyl 3-hydroxybutanoate, is researched, Molecular C5H10O3, CAS is 53562-86-0, about A Bis-Steroidal Phosphine as New Chiral Hydrogenation Ligand, the main research direction is asym hydrogenation bissteroidal phosphine ligand preparation; stereoselective reduction ligand bissteroidal phosphine preparation.Synthetic Route of C5H10O3.

The new atropisomeric bissteroidal ligands R- and S-I are synthesized in 4 steps from the steroid precursor equilenin. The diastereomeric ligands are separable by column chromatog. and exhibit mirror image CD spectra. Likewise, they induce in the chiral reduction of acetophenone to enantiomeric 1-phenylethanols. The synthesis of the phosphine ligands R- and S-I is accomplished by a Ni-mediated cross coupling of the corresponding triflates with Ph2PH. The application of this new bissteroidal phosphine in the hydrogenation of Me acetoacetate, phenylcinnamic acid, and tiglic acid show that the in situ prepared chiral catalyst RuCl2(ligand)(DMF)2 is more active in terms of enantiomeric excess and/or conversion than the corresponding BINAP-derived catalyst.

Compound(53562-86-0)Synthetic Route of C5H10O3 received a lot of attention, and I have introduced some compounds in other articles, similar to this compound((S)-Methyl 3-hydroxybutanoate), if you are interested, you can check out my other related articles.

Reference:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics

Formula: C5H10O3. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: (S)-Methyl 3-hydroxybutanoate, is researched, Molecular C5H10O3, CAS is 53562-86-0, about A kinetic study and application of a novel carbonyl reductase isolated from Rhodococcus erythropolis. Author is Zelinski, Thomas; Kula, Maria-Regina.

The newly described carbonyl reductase from Rhodococcus erythropolis (RECR) accepts a broad range of substrates. Based on the kinetic constants of a variety of Me and Et ketones a hypothetical model of the substrate-binding site is proposed. Whether a substrate of interest may be reduced by the RECR can be predicted from this model together with the kinetic data. A study of initial velocities and product inhibition is presented, which shows that the kinetics of the RECR follow a Theorell-Chance mechanism. The pro-R hydride of NADH is transferred by the enzyme to the re face of the carbonyl compounds yielding (S)-alcs. The reduction of Me 3-oxobutanoate and Et 4-chloro-3-oxobutanoate catalyzed by the oxidoreductase lead to the corresponding hydroxy compounds with high enantiomeric purity [enantiomeric excess (e.e.) ≥99%]. The synthesis of Et (2R,3S)-3-hydroxy-2-methylbutanoate was accomplished with high diastereoselectivity (diastereomeric excess = 95%) and enantioselectivity (e.e. ≥95%).

Compound(53562-86-0)Formula: C5H10O3 received a lot of attention, and I have introduced some compounds in other articles, similar to this compound((S)-Methyl 3-hydroxybutanoate), if you are interested, you can check out my other related articles.

Reference:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 5-Fluoroindoline( cas:2343-22-8 ) is researched.Quality Control of 5-Fluoroindoline.Pang, Shaofeng; Liu, Fangfang; Zhang, Yujing; Dong, Zhaowen; Su, Qiong; Wang, Wenfang; Li, Zhenhua; Zhou, Feng; Wang, Yanbin published the article 《Construction of Functional Superhydrophobic Biochars as Hydrogen Transfer Catalysts for Dehydrogenation of N-Heterocycles》 about this compound( cas:2343-22-8 ) in ACS Sustainable Chemistry & Engineering. Keywords: construction functional superhydrophobic biochars hydrogen transfer catalyst dehydrogenation nitrogen. Let’s learn more about this compound (cas:2343-22-8).

To endow metal-free materials with the high catalytic activity that is typically featured by a metal-based catalyst is yet a constant pursuit in the field of catalytic chem. In this work, novel functional biochars (DCNs) were prepared from wheat straw for the first time via a simple strategy of reconstructing the catalytic active sites in carbon precursors and subsequent controlled carbonization, which may be further applied in the oxidative dehydrogenation of N-heterocycles with ambient air as the oxidant. Whereas the superhydrophobicity of DCN-850 can effectively remove the only byproduct water to effectively reduce the possible effects of water on the catalyst, it also can decrease mass transfer resistance on active sites, thereby ensuring the reaction with high efficiencies and good generality. Especially, after several reuses, the activity and structures of DCN-850 remained unchanged in the catalytic system with water as a solvent. Furthermore, various characterization technologies and the model reaction were used to investigate the architectural attributes of DCNs, and the results show that there is a pos. correlation between the catalytic performance and hydrophobicity of DCNs, as well as reveal that the catalytic active sites may be made up of a five-membered-ring ketone or its enol form and possibly a phenolic unit, which could be encapsulated in internal structures of catalysts and promote the reaction via the recycling of -C-C-OH and -C-C=O groups by the pathway of catalytic hydrogen transfer.

Compound(2343-22-8)Quality Control of 5-Fluoroindoline received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(5-Fluoroindoline), if you are interested, you can check out my other related articles.

Reference:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics

Application In Synthesis of (S)-Methyl 3-hydroxybutanoate. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: (S)-Methyl 3-hydroxybutanoate, is researched, Molecular C5H10O3, CAS is 53562-86-0, about Durability enhancement of chirally modified metallic nickel catalysts for enantioselective hydrogenation. Author is Osawa, Tsutomu; Kizawa, Tomoko; Lee, I-Yin Sandy; Ikeda, Shinji; Kitamura, Takayuki; Inoue, Yoshihisa; Borovkov, Victor.

Metallic Ni catalysts co-modified with (R,R)-tartaric acid and NaBr showed high enantioselectivity and durability upon hydrogenation of Me acetoacetate to give Me 3-hydroxybutyrate. The chirally modified catalyst prepared from 3-μm Ni powder was highly robust to maintain the hydrogenation activity and enantiodifferentiating ability for ca. 3 mo under dry condition, which enables long-term storage and hence facilitates com. distribution and industrial application.

Compound(53562-86-0)Application In Synthesis of (S)-Methyl 3-hydroxybutanoate received a lot of attention, and I have introduced some compounds in other articles, similar to this compound((S)-Methyl 3-hydroxybutanoate), if you are interested, you can check out my other related articles.

Reference:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics

SDS of cas: 66-71-7. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: 1,10-Phenanthroline, is researched, Molecular C12H8N2, CAS is 66-71-7, about Two new Cu(II) complexes based on 5-fluorouracil-1-yl acetic acid and N-donor ligands: Investigation of their interaction with DNA and anticancer activity. Author is Xi, Yun-Hong; Yan, Xin; Bigdeli, Fahime; Zhang, Qianwen; Esrafili, Leili; Hanifehpour, Younes; Zhang, Wei-Bing; Hu, Mao-Lin; Morsali, Ali.

Two new Cu(II) complexes [Cu(bpy)2L1] BF4·CH3OH (Z3) and [Cu (phen)2L1] BF4·H2O (Z = 9), L1 = 5-Fluorouracil-1-yl Acetic Acid, were synthesized based on 5-Fluorouracil-1-yl Acetic Acid and 2,2′-Bipyridine or 1,10-phenanthroline ligands and their anticancer activity toward human cancer cell lines studied. The complexes were characterized by IR spectra, elemental anal., and x-ray crystallog. The interaction of the complexes with CT-DNA was studied by UV-visible absorption and fluorescence spectroscopies, and cyclic voltammetry; cell viability (%) was studied using the absorbance amount of the samples. The interaction mode of the complexes with DNA is electrostatic, and the complexes displayed good anticancer activity against HCT 116 (human colorectal cancer cells) and MDA-MB-231 (MD Anderson-metastatic breast) cell lines with best IC50 amount of 11.31 ± 0.74μM for Z = 9. The nature of the nitrogen-donor ligand is very effective in the anticancer activity of the complexes.

Compound(66-71-7)SDS of cas: 66-71-7 received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(1,10-Phenanthroline), if you are interested, you can check out my other related articles.

Reference:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics

Formula: C8H8FN. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: 5-Fluoroindoline, is researched, Molecular C8H8FN, CAS is 2343-22-8, about Palladium-Catalyzed Remote 1,n-Arylamination of Unactivated Terminal Alkenes. Author is Han, Chunhua; Fu, Zhiyuan; Guo, Songjin; Fang, Xinxin; Lin, Aijun; Yao, Hequan.

A palladium-catalyzed remote 1,n-arylamination (from 1,3- to 1,11-arylamination) of unactivated terminal alkenes with aryl iodides and arylamines has been realized. This three-component reaction proceeded via Pd-catalyzed Heck arylation, alkene isomerization, and aza-Michael addition, exhibiting good regio- and chemoselectivity, and wide substrate scope. Preliminary mechanistic studies indicated that the in situ generated ortho/para-quinone methide intermediates served as the driving force for the alkene isomerization and promoted the rearomatization upon nucleophilic amination.

Compound(2343-22-8)Formula: C8H8FN received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(5-Fluoroindoline), if you are interested, you can check out my other related articles.

Reference:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics

Formula: C8H8FN. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 5-Fluoroindoline, is researched, Molecular C8H8FN, CAS is 2343-22-8, about Oxidative Palladium(II)-Catalyzed C-7 Alkenylation of Indolines. Author is Jiao, Lin-Yu; Oestreich, Martin.

N-(dimethylcarbamoyl)indolines such as I underwent regioselective and stereoselective alkenylation with electron-deficient alkenes and styrenes RR1C:CHR2 [R = BuO2C, MeO2C, EtO2C, PhCH2O2C, MeCO, NC, (EtO)2P(:O), Ph, F5C6, 4-FC6H4, 4-ClC6H4, 2-ClC6H4, 2-BrC6H4; R1, R2 = H, Me] with 1,4-benzoquinone in acetic acid in the presence of Pd(OAc)2 and p-toluenesulfonic acid to give (E)-7-alkenylindolinecarboxamides such as II in 21-89% yield and all except II (R = MeO2C; R1 = H; R2 = Me) as the (E)-isomers in >98:2 dr. The tetrasubstituted urea moiety functioned as a directing group for directed alkenylation; non-urea directing groups either yielded alkenylation products in low (20%) yield or did not yield alkenylation products. An ethylcarbamoylindoline underwent alkenylation with Bu acrylate followed by cyclization to give oxoindolopyrimidineacetate III.

Compound(2343-22-8)Formula: C8H8FN received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(5-Fluoroindoline), if you are interested, you can check out my other related articles.

Reference:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics

Safety of (S)-Methyl 3-hydroxybutanoate. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: (S)-Methyl 3-hydroxybutanoate, is researched, Molecular C5H10O3, CAS is 53562-86-0, about Rhizopus arrhizus mediated asymmetric reduction of alkyl 3-oxobutanoates. Author is Salvi, Neeta A.; Chattopadhyay, Subrata.

Alkyl 3-oxobutanoates MeCOCH2CO2R (R = Me, Et, H2C:CHCH2, Me2CHCH2, Me3C) were reduced enantioselectively to the corresponding (S)-alcs. MeCH(OH)CH2CO2R by the fungus Rhizopus arrhizus and other Rhizopus sp. The best result obtained was with t-Bu 3-oxobutanoate, which was reduced by R. arrhizus with 99% enantiomeric excess and in 68% isolated yield.

Compound(53562-86-0)Safety of (S)-Methyl 3-hydroxybutanoate received a lot of attention, and I have introduced some compounds in other articles, similar to this compound((S)-Methyl 3-hydroxybutanoate), if you are interested, you can check out my other related articles.

Reference:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics

Computed Properties of C8H8FN. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: 5-Fluoroindoline, is researched, Molecular C8H8FN, CAS is 2343-22-8, about Design, synthesis and biological evaluation of novel 2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole triazole derivatives as potent TRPV1 antagonists. Author is Li, Jinyu; Nie, Cunbin; Qiao, Yue; Hu, Jing; Li, Qifei; Wang, Qiang; Pu, Xiaohui; Yan, Lin; Qian, Hai.

The design, synthesis, and pharmacol. evaluation of a class of TRPV1 antagonists constructed on 2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole as A-region and triazole as B-region I (R = 2-Cl 2,5-Me2, 2-NO2-4-Cl, etc.) have been reported. The SAR anal. indicated that 2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole analogs I displayed excellent antagonism of hTRPV1 activation by capsaicin and showed better potency compared to the corresponding dihydroindole analogs. Optimization of this design led to the eventual identification of compound I (R = 2-CF3), a potent TRPV1 antagonist. In vitro, using cells expressing recombinant human TRPV1 channels, I (R = 2-CF3) displayed potent antagonism activated by capsaicin (IC 50 = 0.075 μM) and only partially blocked acid activation of TRPV1. In vivo, I (R = 2-CF3) exhibited good efficacy in capsaicin-induced and heat-induced pain models and had almost no hyperthermia side-effect. Furthermore, pharmacokinetic studies revealed that compound I (R = 2-CF3) had a superior oral exposure after oral administration in rats. To understand its binding interactions with the receptor, the docking study of I (R = 2-CF3) was performed in rTRPV1 model and showed an excellent fit to the binding site. On the basis of its superior profiles, I (R = 2-CF3) could be considered as the lead candidate for the further development of antinociceptive drugs.

Compound(2343-22-8)Computed Properties of C8H8FN received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(5-Fluoroindoline), if you are interested, you can check out my other related articles.

Reference:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics