Remote diastereoselective control via organoiron methodology: Stereoselective preparation of 4,6-, 5,7- and 6,8-dien-2-ol (tricarbonyl) iron complexes
作者:Peter T. Bell、Bireshwar Dasgupta、William A. Donaldson
DOI:10.1016/s0022-328x(96)06916-1
日期:1997.6
The diastereoselective preparation of 2,3-, 2,4- and 2,5-diol iron complexes was accomplished in the following fashion: (2,4,6-octatriene)Fe(CO)3 undergoes diastereoselective osmylation to provide (4,6-octadien-2,3-diol)Fe(CO)3; (4-hydroxy-5,7-nonadien-2-one)Fe(CO)3 may be reduced in a diastereoselective fashion to give mixtures predominating in either the syn- or anti-(5,7-nonadien-2,4-diol)Fe(CO)3;
以下列方式完成2,3-,2,4-和2,5-二醇铁配合物的非对映选择性制备:(2,4,6-辛三烯)Fe(CO)3经历非对映选择性的osmylation,以提供(4, 6-辛二烯-2,3-二醇)Fe(CO)3;可以以非对映选择性的方式还原(4-羟基-5,7-壬二烯-2-酮)Fe(CO)3以得到以顺-或反-(5,7-壬二烯-2,4-为主的混合物二醇)Fe(CO)3;将MeTi(O i Pr)3和非对映异构体添加到(5-羟基-6,8-癸二烯基)Fe(CO)3的内酯中得到(6,8-癸二烯-2,5-二醇)Fe(CO)3。在上述每种情况下,可以通过离子氢化除去与(二烯)Fe(CO)3基团相邻的羟基。该羟基的电离基于反式(戊二烯基)Fe(CO)3阳离子物种的中间性而合理化。