PREPARATION D'OLEFINES TRISUBSTITUEES BIFONCTIONNELLES PAR VOIE PHOTOCHIMIQUE

Article abstract of DOI:10.1016/0040-4020(84)85066-8

α-methyl α-functionalized (CO2CH3, CN, CH2OH and CH2Cl) cyclopentanones 2 when irradiated by UV light give title compounds : 5-substituted 4-hexen 1-al 4 as a mixture of E and Z isomers.A comparison of the photochemical behaviour of this cyclopentanones and a simple and efficient chemical transformation of the isomers Z in the more demanded isomers 4 E are described.