Photochemical reactions of chromium-alkoxycarbene complexes with stabilized ylides to produce push-pull captodative allenes
作者:Michael R. Sestrick、Michael Miller、Louis S. Hegedus
DOI:10.1021/ja00037a008
日期:1992.5
Photolysis of chromium alkoxycarbene complexes in the presence of stabilized ylides produced allenes having effect withdrawing groups on C-1 and electron donating groups on C-3. These highly reactive captodative allenes rearranged to 1,3-substituted-1,3-dienes under mildly acidic conditions and hydrolyzed to γ-ket-α,β-unsaturated esters, both in excellent yield
Reactions of alkynols with (alkynylalkoxycarbene)metal complexes (metal = chromium, tungsten)
作者:Antonia Segundo、Josep M. Moreto、Josep M. Vinas、Susagna Ricart、Elies Molins
DOI:10.1021/om00018a045
日期:1994.6
(Alkynylalkoxycarbene)metal complexes react with alkynols to give different types of products depending fundamentally on the substitution of the triple bond (mono- or disubstituted alkynes) and the spacing between the triple bond and the hydroxy functions.