作者:Marco Lombardo、Alessandra Gualandi、Filippo Pasi、Claudio Trombini
DOI:10.1002/adsc.200600378
日期:2007.2.5
An efficient cobalt(I)-catalysed Reformatsky reaction using α-chloro esters has been developed. The catalyst is prepared by reducing the cobalt(II) chloride (5 %)/1,2-bis(diphenylphosphino)ethane (dppe)(5 %)/zinc iodide (10 %) system with zinc metal in acetonitrile in the presence of both the α-chloro ester and the carbonyl compound; good to excellent conversions to β-hydroxy esters are obtained at
已开发出一种高效的钴(I)催化的使用α-氯代酯的Reformatsky反应。通过在乙腈存在下用锌金属还原氯化钴(II)(5%)/ 1,2-双(二苯基膦基)乙烷(dppe)(5%)/碘化锌(10%)体系来制备催化剂。 α-氯酯和羰基化合物都;在室温下2.5小时内,可以很好地转化为β-羟基酯。