Synthesis of sterically encumbered biaryls based on a ‘copper(I)-catalyzed arylation/[3+3] cyclocondensation’ strategy
摘要:
Sterically encumbered biaryls are prepared in two steps by Cul-proline-catalyzed arylation of acetylacetone to give 3-arylpentane-2,4-diones and subsequent formal [3+3] cyclization of the latter with 1,3-bis(trimethylsilyloxy)-1,3-dienes. (C) 2008 Elsevier Ltd. All rights reserved.
Sterically encumbered biaryls are prepared in two steps by Cul-proline-catalyzed arylation of acetylacetone to give 3-arylpentane-2,4-diones and subsequent formal [3+3] cyclization of the latter with 1,3-bis(trimethylsilyloxy)-1,3-dienes. (C) 2008 Elsevier Ltd. All rights reserved.