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.