The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 2-Bromopriopionaldehydediethylacetal, is researched, Molecular C7H15BrO2, CAS is 3400-55-3, about Convenient method for the synthesis of 2-(1-alkenyl)-2-cyclopentenones, the main research direction is cyclopentenone alkenyl; bromo acetal addition enol; silyl enol ether addition.Safety of 2-Bromopriopionaldehydediethylacetal.
Treatment of α-bromo acetals, BrCRR1CR2(OR3)2 [R = H, Me; R1 = H, Me, Et, Bu; R2 = H; or R1R2 = (CH2)4; R3 = Me, Et], with TiCl4 and then with silyl enol ether I (in CH2Cl2 dropwise at -78° under argon) gave β-alkoxy-γ-bromo ketones which were heated first in PhMe-P-MeC6H4SO3H and then DMF-Et3V to give the title cyclopentenones II. Brominated derivatives were also formed in some cases by addition of HBr (eliminated in the reactions) to the double bonds of II.
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Reference:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics