A very mild, catalytic and versatile procedure for α-oxidation of ketone silyl enol ethers using (salen)manganese(<scp>III</scp>) complexes; a new, chiral complex giving asymmetric induction. A possible model for selective biochemical oxidative reactions through enol formation
作者:D. Reddeppa Reddy、Edward R. Thornton
DOI:10.1039/c39920000172
日期:——
Facile, catalytic, selective (racemic and asymmetric) oxidation of ketone silyl enol ethers to give α-oxygenated products proceeds well under very mild, aprotic conditions using a racemic (salen)manganese(III) complex [H2salen = bis(salicylidene)ethylenediamine] or a new, chiral C2-symmetric pyrrolidine-based manganese(III) complex as catalyst, with iodosobenzene as the terminal oxidant at ambient temperature.
使用外消旋 (salen) 锰 (III) 络合物 [H2salen = 双(水杨基) 乙二胺,在非常温和的非质子条件下,对酮硅基烯醇醚进行轻松、催化、选择性(外消旋和不对称)氧化,得到 α-氧化产物。 ]或一种新型手性C2-对称吡咯烷基锰(III)络合物作为催化剂,在环境温度下以碘代苯作为末端氧化剂。