Reactive species from aromatics and oxa-di-π-methane rearrangement: a stereoselective synthesis of (±)-hirsutene from salicyl alcohol
作者:Vishwakarma Singh、Punitha Vedantham、Pramod K. Sahu
DOI:10.1016/j.tet.2004.06.096
日期:2004.9
yclo[5.2.2.02,6]undeca-10-en-8-one followed by radical induced cleavage of peripheral cyclopropane bond, olefination and Simmon–Smith reaction furnished 11-hydroxy-1-methyl-4-spirocyclopropanetricyclo[6.3.0.02,6]undecane that upon treatment with hydrogen on PtO2 and PCC oxidation gave 1,4,4-trimethyltricyclo[6.3.0.02,6]undecan-11-one, a known precursor. Wittig methylenation on this precursor gave hirsutene
据报道,由水杨醇完全合成了hirsutene(一种三喹烷倍半萜烯)。在环戊二烯存在下氧化水杨醇得到9-螺氧基-环氧-内-三环[5.2.2.0 2,6 ] undeca-4,10-dien-8-,其被精制为3-羟基-2-甲基-内-tricyclo [5.2.2.0 2,6 ] undeca-10-en-8-包含hirsutene的主要结构和功能特征。在光化学σ迁移1,2-酰基移3-羟基-2-甲基-内三环[5.2.2.0 2,6 ]十一碳-10-烯-8-酮随后外围环丙烷键,烯和西蒙的自由基诱导的切割-史密斯反应制得的11-羟基-1-甲基-4-螺环丙烷三环[6.3.0.0 2,6]十一烷,即在PtO 2上用氢处理和PCC氧化后得到已知的前体1,4,4-三甲基三环[6.3.0.0 2,6 ]十一碳烷-11-one。该前体上的维蒂希甲基化产生了hirsutene。