Category: 53562-86-0

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Tetrahedron Letters called Total synthesis of macrosphelide A by way of palladium-catalyzed carbonylative esterification, Author is Kusaka, Shin-ichi; Dohi, Suguru; Doi, Takayuki; Takahashi, Takashi, which mentions a compound: 53562-86-0, SMILESS is C[C@H](O)CC(OC)=O, Molecular C5H10O3, SDS of cas: 53562-86-0.

The total synthesis of macrosphelide A (I) has been achieved with a highly convergent and efficient strategy. Key steps include the preparation of seco-acid II using sequential carbonylative esterification, and subsequent macrolactonization.

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In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called The role of the solvent in the asymmetric hydrogenation of β-keto esters with Ru-BINAP, published in 2003-05-01, which mentions a compound: 53562-86-0, mainly applied to solvent asym hydrogenation keto ester ruthenium BINAP; transition metal solvent asym hydrogenation keto ester ruthenium BINAP; alkane asym hydrogenation keto ester ruthenium BINAP; ether asym hydrogenation keto ester ruthenium BINAP; ester asym hydrogenation keto ester ruthenium BINAP; alc asym hydrogenation keto ester ruthenium BINAP; haloalkane asym hydrogenation keto ester ruthenium BINAP; nitrile asym hydrogenation keto ester ruthenium BINAP; cyclic ether asym hydrogenation keto ester ruthenium BINAP; keto ester asym hydrogenation keto ester ruthenium BINAP, Recommanded Product: 53562-86-0.

The influence of the solvent on the asym. hydrogenation of Me acetoacetate, as a representative β-keto esters, with Ru-BINAP was studied. The catalyst used in this study was [(1R)-[1,1′-Binaphthalene]-2,2′-diylbis[diphenylphosphine-κP]]chloro[(1,2,3,4,5,6-η)-1-methyl-4-(1-methylethyl)benzene]ruthenium(1+) chloride. [(1S)-[1,1′-Binaphthalene]-2,2′-diylbis[diphenylphosphine-κP]]chloro[(1,2,3,4,5,6-η)-1-methyl-4-(1-methylethyl)benzene]ruthenium(1+) chloride was also used to give (3S)-3-Hydroxybutanoic acid Me ester from 3-oxobutanoic acid Me ester. The highest activities were measured when the reaction proceeded in methanol, ethanol or isopropanol. These solvents, which also act as proton donors, accelerate product release from the reaction intermediate. The presence of water in the reaction mixture has been found to be detrimental for both activity and enantioselectivity. All results could be explained by the existence of two different solvent dependent reaction pathways for product release.

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Piperazine – Wikipedia,
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Huang, Yen-Kai; Tsai, Shau-Wei published an article about the compound: (S)-Methyl 3-hydroxybutanoate( cas:53562-86-0,SMILESS:C[C@H](O)CC(OC)=O ).Computed Properties of C5H10O3. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:53562-86-0) through the article.

Optically pure (R)-β-butyrolactone as an important chiral building block in the syntheses of various biol. active compounds and biodegradable polymers was prepared from (R,S)-β-butyrolactone through kinetic resolution Candida antarctica lipase B (CALB) with a high enantiomeric ratio of 198 enantioselectively catalyzed the ring opening of the racemate with methanol in Me tert-Bu ether at 45 °C and yielded the remaining (R)-β-butyrolactone. A detailed kinetic anal. indicated that methanol and (R)- and (S)-Me ester all acted as competitive inhibitors for the enzyme. Comparisons of the theor. and exptl. conversions for both enantiomers were further made and elucidated. The thermodn. anal. implied the enantiomer discrimination for the transition states of both enantiomers to be entropy-driven in the temperature range investigated. Moreover, preliminary results from the lipase reusability, feed-batch operation, and remaining substrate recovery were addressed.

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Piperazine – Wikipedia,
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Related Products of 53562-86-0. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: (S)-Methyl 3-hydroxybutanoate, is researched, Molecular C5H10O3, CAS is 53562-86-0, about Asymmetric reduction of β-keto esters with an enzyme from bakers’ yeast.

Various β-keto esters have been reduced by one of β-keto ester reductases isolated from bakers’ yeast. The corresponding β-hydroxy esters have been obtained in excellent enantiomeric and diastereomeric excesses, resp. It has also been determined that the reductase recognizes the stereochem. not only at the β-carbon but also at the α-carbon affording one of the four possible diastereoisomers of α-substituted β-hydroxy esters predominantly. The stereoselectivity is excellent and chem. yields are moderate to good.

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Piperazine – Wikipedia,
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Madec, J.; Pfister, X.; Phansavath, P.; Ratovelomanana-Vidal, V.; Genet, J.-P. published the article 《Asymmetric hydrogenation reactions using a practical in situ generation of chiral ruthenium-diphosphine catalysts from anhydrous RuCl3》. Keywords: asym hydrogenation catalyst ruthenium diphosphine.They researched the compound: (S)-Methyl 3-hydroxybutanoate( cas:53562-86-0 ).Name: (S)-Methyl 3-hydroxybutanoate. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:53562-86-0) here.

A very simple in situ preparation of chiral ruthenium-diphosphine catalysts from anhydrous RuCl3 is reported. Prochiral C:O and C:C bonds have been reduced with high enantioselectivities via ruthenium-catalyzed hydrogenation.

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

Rodriguez, Sonia; Schroeder, Kersten T.; Kayser, Margaret M.; Stewart, Jon D. published an article about the compound: (S)-Methyl 3-hydroxybutanoate( cas:53562-86-0,SMILESS:C[C@H](O)CC(OC)=O ).COA of Formula: C5H10O3. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:53562-86-0) through the article.

E. coli strains expressing Gcy1p and Gre3p reduced β-keto esters R1COCHR2CO2R3 (R1 = Me, Et; R2 = H, Me, Et, allyl, propargyl; R3 = Me, Et) to give chiral β-hydroxy esters (S)- and (2R,3S)-R1CH(OH)CHR2CO2R3.

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Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics

Related Products of 53562-86-0. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: (S)-Methyl 3-hydroxybutanoate, is researched, Molecular C5H10O3, CAS is 53562-86-0, about Asymmetric reduction of β-keto esters with an enzyme from bakers’ yeast.

Various β-keto esters have been reduced by one of β-keto ester reductases isolated from bakers’ yeast. The corresponding β-hydroxy esters have been obtained in excellent enantiomeric and diastereomeric excesses, resp. It has also been determined that the reductase recognizes the stereochem. not only at the β-carbon but also at the α-carbon affording one of the four possible diastereoisomers of α-substituted β-hydroxy esters predominantly. The stereoselectivity is excellent and chem. yields are moderate to good.

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

Madec, J.; Pfister, X.; Phansavath, P.; Ratovelomanana-Vidal, V.; Genet, J.-P. published the article 《Asymmetric hydrogenation reactions using a practical in situ generation of chiral ruthenium-diphosphine catalysts from anhydrous RuCl3》. Keywords: asym hydrogenation catalyst ruthenium diphosphine.They researched the compound: (S)-Methyl 3-hydroxybutanoate( cas:53562-86-0 ).Name: (S)-Methyl 3-hydroxybutanoate. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:53562-86-0) here.

A very simple in situ preparation of chiral ruthenium-diphosphine catalysts from anhydrous RuCl3 is reported. Prochiral C:O and C:C bonds have been reduced with high enantioselectivities via ruthenium-catalyzed hydrogenation.

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

Rodriguez, Sonia; Schroeder, Kersten T.; Kayser, Margaret M.; Stewart, Jon D. published an article about the compound: (S)-Methyl 3-hydroxybutanoate( cas:53562-86-0,SMILESS:C[C@H](O)CC(OC)=O ).COA of Formula: C5H10O3. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:53562-86-0) through the article.

E. coli strains expressing Gcy1p and Gre3p reduced β-keto esters R1COCHR2CO2R3 (R1 = Me, Et; R2 = H, Me, Et, allyl, propargyl; R3 = Me, Et) to give chiral β-hydroxy esters (S)- and (2R,3S)-R1CH(OH)CHR2CO2R3.

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

Reference of (S)-Methyl 3-hydroxybutanoate. 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 Highly Stereoselective Reagents for β-Keto Ester Reductions by Genetic Engineering of Baker’s Yeast. Author is Rodriguez, Sonia; Kayser, Margaret M.; Stewart, Jon D..

While whole cells of baker’s yeast (Saccharomyces cerevisiae) are a convenient biocatalytic reducing agent for a wide variety of carbonyl compounds, mixtures of stereoisomeric alcs. are often observed since the organism contains a large number of reductase enzymes with overlapping substrate specificities but differing stereoselectivities. We sought to improve the performance of baker’s yeast for β-keto ester reductions by using recombinant DNA techniques to alter the levels of three enzymes known to play important roles in these reactions (fatty acid synthase, Fasp; aldo-keto reductase, Ypr1p; α-acetoxy ketone reductase, Gre2p). A complete set of “”first-generation”” yeast strains that either lack or overexpress each of these three enzymes was created and tested for improvements in stereoselective reductions of a series of β-keto esters. On the basis of these results, multiply modified (“”second-generation””) strains were created that combined gene knockout and overexpression in single strains. In some cases, these addnl. modifications further improved the stereoselectivities of β-keto ester reductions, thereby making several β-hydroxy ester building blocks readily available by reactions that can be performed by nonspecialists. This work also revealed that addnl. yeast proteins participate in reducing β-keto esters, and further progress using this strategy will require either addnl. genetic manipulations or the expression of yeast reductases in hosts that lack enzymes with overlapping substrate specificity.

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