REACTIONS OF CYCLOHEXANE DERIVATIVES IN SUPERACIDS
REACTIONS OF CYCLOHEXANE DERIVATIVES IN SUPERACIDS
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DOI:
10.1039/p29910001541
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发表时间:
1991-10-01
期刊:
影响因子:
--
通讯作者:
WHITTAKER, D
中科院分区:
文献类型:
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作者:
DEAN, C;WHITTAKER, D
The reactions of menthol with FSO3H-SO2 and neomenthyl chloride with SbF5-SO2ClF follow different routes. The first yields a substituted cyclopentyl cation and the second a substituted cyclohexyl cation. Experiments on substituted cyclohexyl chlorides show that replacement of all the hydrogen atoms on the next but one carbon atom to the reaction centre blocks formation of a carbocation. It is suggested that ionisation of an equatorial chlorine atom takes place with assistance from an intramolecular electronic interaction, forming the methyl cyclopentyl carbocation in a synchronous process, rather than stepwise via the cyclohexyl carbocation. Reasons for contrasting behaviour in solvolytic reactions are discussed.