The Carbene Fragmentation−Ring Expansion Route to Bridgehead Carbocations
摘要:
[GRAPHICS]The products, kinetics, and activation parameters were determined for the fragmentation-ring expansions of 1-norbornylmethyloxychlorocarbene (11) and 3-noradamantylmethyloxychlorocarbene (17). Products from 11 (in dichloroethane) included 1-chlorobicyclo[2.2.2]octane (9, 56%) and 1-chlorobicyclo[3.2.1]octane (10, 37%); from 17, we obtained I-chloroadamantane (15, 68%) and protoadamantyl chloride (16, 28%).
Fragmentation of alkoxychlorocarbenes in the gas phase
作者:Michael E Blake、Maitland Jones、Fengmei Zheng、Robert A Moss
DOI:10.1016/s0040-4039(02)00438-0
日期:2002.4
In contrast to photolysis or thermaldecomposition in solution, which is dominated by ionic reactions, flash vacuum pyrolysis of alkylchlorodiazirines in the gas phase generates radicals. The cyclopropylcarbinyl system is re-examined and the 1-norbornylcarbinyl system is studied for the first time.