Mechanism, regiochemistry, and stereochemistry of the insertion reaction of alkynes with methyl(2,4-pentanedionato)(triphenylphosphine)nickel. A cis insertion that leads to trans kinetic products
Photochemical Wittig reaction of quasi-phosphonium ylides
作者:Hideo Tomioka、Naoki Ichikawa、Hideki Murata
DOI:10.1039/c39920000193
日期:——
α-(Methoxycarbonyl)benzylidene quasi-phosphonium ylides, which are unreactive toward most carbonyl compounds, are found to undergo the Wittig reaction upon irradiation; irradiation with acyclic carbonyl compounds, e.g. benzaldehydes and acetophenones, afford the corresponding alkenes, whereas the reaction with cyclohexanone affords 1-phenyl-1-(methoxycarbonyl)hepta-1, 2-diene.