Preparation of 3-bromomethyl-3-butenal diethylacetal and its conversion into isoprenoid aldehydes derivatives
作者:I. V. Mineeva、O. G. Kulinkovich
DOI:10.1134/s1070428009110086
日期:2009.11
The cyclopropanation of ethyl 3,3-diethoxypropionate with alkoxytitanacyclopropane reagents followed by the cleavage of the three-membered carbocycle in the formed cyclopropyl mesylate provided in a good yield 3-bromomethyl-3-butenal diethylacetal. The latter was brought into reactions of aldehyde allylation and cross-coupling with allyl halides in the intermediate stages at the generation of carbanionic intermediates. The conversion of compounds obtained into the corresponding beta, gamma- or alpha,beta-unsaturated aldehydes demonstrated the opportunity of applying 3-bromomethyl-3-butenal diethylacetal as a C-5-isoprenoid building block.
Synthesis of phenyl analog of retinoic acid methyl ester proceeding from 3-(bromomethyl)but-3-enal diethylacetal
作者:V. S. Masyuk、I. V. Mineeva
DOI:10.1134/s1070428017110045
日期:2017.11
Aromatic analog of retinoic acid methylester was prepared using a convenient prenylating agent, 3-(bromomethyl)but-3-enal diethylacetal, and Barbier reaction in the key stage of building up the carbon chain of target molecules. A version is offered of the synthesis of methylidene analog of aromatic retinoic acid.