Base-promoted ring expansion of 2-alkoxy-2-vinylbenzocyclobutenol into substituted naphthalene derivatives
摘要:
Upon treatment with lithium dialkylamide, 2-alkoxy-2-vinylbenzocyclobutenols undergo two-carbon expansion to give substituted naphthalene derivatives. (C) 1998 Elsevier Science Ltd. All rights reserved.
Base-promoted ring expansion of 2-alkoxy-2-vinylbenzocyclobutenol into substituted naphthalene derivatives
摘要:
Upon treatment with lithium dialkylamide, 2-alkoxy-2-vinylbenzocyclobutenols undergo two-carbon expansion to give substituted naphthalene derivatives. (C) 1998 Elsevier Science Ltd. All rights reserved.
[reaction: see text] The stereochemistry of the thermal conversion of alkenylbenzocyclobutenol into dihydronaphthalene was studied. Experiments on the substrates IV, in which two oxy functions are cis, often resulted in the formation of abnormal products in view of the orbital consideration.