Low temperature carbene transfer from alkoxychromium(0) (Fischer) carbene complexes
作者:Miguel A Sierra、Juan C del Amo、Marı́a J Mancheño、Mar Gómez-Gallego
DOI:10.1016/s0040-4039(01)01082-6
日期:2001.8
Irradiation at low temperatures (0°C) of alkyl-, aryl- and styryl alkoxychromium(0)carbene complexes in the presence of methyl acrylate produces a mixture of diastereomeric cyclopropanes and C–H insertion derivatives. The ratio cyclopropane/C–H insertion product is independent of the reaction conditions, while the cyclopropane cis:trans ratio strongly depends on the solvent, the selectivity increasing
在丙烯酸甲酯的存在下,在低温(0°C)下辐照烷基,芳基和苯乙烯基烷氧基铬(0)卡宾络合物会生成非对映体环丙烷和CH插入衍生物的混合物。环丙烷/ C–H插入产物的比率与反应条件无关,而环丙烷的顺式:反式比率在很大程度上取决于溶剂,选择性随反应溶剂的极性而增加。