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
在稳定的叶立德存在下,铬烷氧基卡宾配合物的光解产生丙二烯,其在 C-1 上具有吸电子基团和在 C-3 上具有给电子基团。这些高反应性的捕获丙二烯在弱酸性条件下重排为 1,3-取代-1,3-二烯并水解为 γ-酮-α,β-不饱和酯,两者均以优异的产率