Osmiumporphyrin-Catalyzed Oxyfunctionalization and Isomerization of Natural (5β)-Bile Acids withtert-Butyl Hydroperoxide
作者:Shoujiro Ogawa、Keiji Hosoi、Takashi Iida、Yasuo Wakatsuki、Mitsuko Makino、Yasuo Fujimoto、Alan F. Hofmann
DOI:10.1002/ejoc.200700158
日期:2007.7
tert-Butyl hydroperoxide catalyzed by (meso-5,10,15,20-tetramesitylporphyrinate)osmium(II) carbonyl [Os(TMP)CO] was shown to be an efficient, versatile oxyfunctionalization system for the methyl ester peracetate derivatives of a series of common, natural (5β)-bile acids. Hydroxylation at C-5 and C-14, ketonization at C-15 and C-16, and isomerization at C-5 and C-14 in the nucleus were all attained
由 (meso-5,10,15,20-tetramesitylporphyrinate) 锇 (II) 羰基 [Os(TMP)CO] 催化的叔丁基过氧化氢被证明是用于一系列过乙酸甲酯衍生物的高效、通用的氧官能化系统常见的天然 (5β)-胆汁酸。C-5和C-14的羟基化、C-15和C-16的酮化以及核内C-5和C-14的异构化均一步完成。讨论了控制区域选择性的因素以及这些化合物的形成机制。 (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)