Reaction of 1-adamantyl cation with carbon monoxide in the presence of adamantane and trifluoromethanesulfonic acid: a convenient route to 3,4-homoadamantanediol
作者:Ken'Ichi Takeuchi、Fumio Akiyama、Tadakazu Miyazaki、Itsuko Kitagawa、Kunio Okamoto
DOI:10.1016/s0040-4020(01)90004-3
日期:——
ic acid (triflic acid) and adamantane affords 3-hydroxy-4-homoadamantyl l-adamantanecarboxylate (2) in 70% yield under appropriate conditions. Among various l-adamantyl cation precursors tested, l-adamantyl trifluoromethanesulfonate (triflate) and methanesulfonate (mesylate) have given the best, comparable results. As to the acid catalyst, fluorosulfonic acid is less effective than triflic acid, and
在常压下,在三氟甲烷磺酸(三氟甲磺酸)和金刚烷的存在下,在四氯化碳中用一氧化碳对l-金刚烷阳离子进行羰基化反应,在70%的收率下,以70%的收率得到3-羟基-4-高金刚烷基l-金刚烷羧酸酯(2)。适当的条件。在测试的各种L-金刚烷基阳离子前体中,L-金刚烷基三氟甲磺酸盐(三氟甲磺酸盐)和甲磺酸盐(甲磺酸盐)给出了最佳的可比结果。对于酸催化剂,氟磺酸的效果不如三氟甲磺酸,而100%的硫酸和甲磺酸对生成2的硫酸完全无效。。建议每摩尔L-金刚烷基甲磺酸酯或三氟甲磺酸酯分别使用三氟甲磺酸和金刚烷五摩尔。该反应通过将1-金刚烷羰基阳离子加到1-金刚烷甲醛中(一种过渡中间体)而进行,然后进行Wagner-Meerwein重排。羟基酯2容易转化为3,4-高金刚烷二醇,这是3,4-双官能高金刚烷衍生物的有前途的原料。