Chemoselective C−H Oxidation of Alcohols to Carbonyl Compounds with Iodosobenzene Catalyzed by (Salen)chromium Complex
作者:Waldemar Adam、Feyissa Gadissa Gelalcha、Chantu R. Saha-Möller、Veit R. Stegmann
DOI:10.1021/jo9913457
日期:2000.4.1
secondary alcohols with benzylically and allylically activated C-H bonds are chemoselectively oxidized to the corresponding carbonyl compounds by the (salen)Cr(III) complex I as the catalyst and iodosobenzene as the oxygen source; the oxidizing species is the Cr(V) oxo complex. Allylic alcohols with fully substituted double bonds give appreciable amounts of epoxides besides the C-H oxidation products
通过(salen)Cr(III)配合物I作为催化剂和碘代苯作为氧源,将具有苄基和烯丙基活化的CH键的伯醇和仲醇化学选择性氧化为相应的羰基化合物。氧化物质是Cr(V)氧配合物。具有完全取代的双键的烯丙醇除CH氧化产物烯酮外,还提供相当数量的环氧化物,而饱和醇则不易被氧化。