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[摘要]：In this study, a facile and general method synthesizing flavone-like 2-aryl-4,9-dihydrocyclohepta[b]-pyran-4,9-diones (2a-y) from 3-cinnamoyltropolones (1a-y) via oxidative cyclization reaction by using I-2/DMSO/H2SO4 system is described. The method was found to be successfully applicable to a wide range of 3-cinnamoyltropolone derivatives and characterized by generality, compatibility, and easy work-up procedures. |
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