Asymmetric desymmetrization of meso-pyrrolidine derivatives by enantiotopic selective CH hydroxylation using (salen)manganese(III) complexes
作者:T. Punniyamurthy、Tsutomu Katsuki
DOI:10.1016/s0040-4020(99)00518-9
日期:1999.7
Chiral (salen)manganese(III) complexes 1 catalyzed the asymmetric desymmetrization of N-protectedmeso-pyrrolidine derivatives 3, 6–8, 15 and 18 by enantiotopic selective C-H oxidation in the presence of terminal oxidant iodosylbenzene. The oxidation occurred chemoselectively at the carbon α to the nitrogen atom to afford optically active hydroxypyrrolidine derivatives 9, 11, 13, 16, 19 and 21 that
手性(沙仑)锰(III)络合物1催化的不对称desymmetrization Ñ -保护的内消旋-吡咯烷衍生物3,6-8,15和18通过在终端氧化剂亚碘酰苯的存在下对映选择性氧化CH。氧化在碳原子上对氮原子进行化学选择,得到旋光的羟基吡咯烷衍生物9、11、13、16、19和21,它们用Jones试剂进一步氧化为手性内酰胺。内消旋吡咯烷衍生物的N-保护基对对映选择性具有显著作用。