Synthesis of Hindered 1-Arylnaphthalene Derivatives via Ring Expansion of Benzocyclobutenones
摘要:
[GRAPHICS]Various 1-aryinaphthalenes, including highly substituted derivatives, are accessible via a simple two-step process. Treatment of alkenylbenzocyclobutenones with aryllithium provides two-carbon expanded dihydronaphthalenes, which are readily dehydrated by MsCl-Et3N or PPTS in MeOH.
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.