5,9-Dihydroxy-4,8,11,11-tetramethyltricyclo[6.3.0.0<sup>2,4</sup>]undecane. Acidcatalyzed Cyclization Product of 6,7-Epoxyhumula-2,9-diene
作者:Misuzu Namikawa、Tatsushi Murae、Takeyoshi Takahashi
DOI:10.1246/bcsj.51.3616
日期:1978.12
6,7-Epoxyhumula-2,9-diene (2) was treated with 1.8 M sulfuric acid–acetone (1 : 1) to yield a new tricyclic diol, 5,9-dihydroxy-4,8,11,11-tetramethyltricyclo[6.3.0.02,4]undecane (9; diol B), together with tricyclohumuladiol (3; diol A), humulenol-II (4), a diol C (5b), a diol D (5a), and an acetonide (8a). The same reaction at 0° gave only 3. Tricyclohumuladiol (3) was shown to be a key intermediate in the reaction of 2 to form 4, 5a, 5b, 8a, and 9.
6,7-环氧胡麻-2,9-二烯(2)用1.8 M硫酸-丙酮(1:1)处理,生成新的三环二醇5,9-二羟基-4,8,11,11-四甲基三环[6.3.0.02,4]十一烷(9;二醇B),以及三环胡麻二醇(3;二醇A)、胡麻烯醇-II(4)、二醇C(5b)、二醇D(5a)和乙酮(8a)。在0°时,同样的反应只生成3。三环胡麻二醇(3)是2反应形成4、5a、5b、8a和9的关键中间体。