Hydroboration of terpenes I. The selective hydroboration of myrcene with disiamylborane
作者:Herbert C. Brown、K.P. Singh、Brian J. Garner
DOI:10.1016/s0022-328x(00)80038-8
日期:1963.10
6-octadiene) occurs selectively to place the boron atom at the 1-position. Oxidation of the resulting organoborane with alkaline hydrogen peroxide yields myrcenol (7-methyl-3-methylene-6-octen-1-ol) identified by infrared and nuclear magnetic resonance spectra. Further hydroboration of myrcenol with disiamylborane, or dihydroboration of myrcene with the reagent, results in selective reaction at the 3-methylene
二亚甲基硼烷与月桂烯(7-甲基-3-亚甲基-1,6-辛二烯)的反应选择性发生,以将硼原子置于1-位。用碱性过氧化氢氧化所得的有机硼烷,得到通过红外和核磁共振光谱鉴定的月桂烯醇(7-甲基-3-亚甲基-6-辛烯-1-醇)。月桂烯醇与二亚氨基硼烷的进一步氢硼化,或月桂烯与试剂的二氢硼化,导致在3-亚甲基上的选择性反应。产物的氧化产生二醇7-甲基-3-羟甲基-6-辛烷-1-醇。因此,月桂烯的三个双键表现出经过的顺序攻击的倾向,RCH 2 CH 2 >RR'CCH 2 > - [R 2CCHR',这是通过使用简单模型系统进行的竞争性实验得出的结果。