Domino ‘Michael-retro-Michael-aldol’ reactions of 1,3-bis-silyl enol ethers with 3-formylchromones
作者:Peter Langer、Bettina Appel
DOI:10.1016/j.tetlet.2003.09.008
日期:2003.10.20
Functionalized benzophenones were prepared by domino 'Michael-retro-Michael-aldol' reactions of 1,3-bis-silyl enol ethers with 3-formylchromones. (C) 2003 Elsevier Ltd. All rights reserved.
Unsaturated polyester resins stabilized with 2-hydroxy-5-salicylylbenzophenone
申请人:AMERICAN CYANAMID CO
公开号:US02818400A1
公开(公告)日:1957-12-31
US4399265A
申请人:——
公开号:US4399265A
公开(公告)日:1983-08-16
A NEW METHOD FOR THE PREPARATION OF DIARYLPHTHALIDES<sup>1</sup>
作者:F. F. Blicke、O. J. Weinkauff
DOI:10.1021/ja01343a025
日期:1932.4
Domino Michael/Retro-Michael/Mukaiyama-Aldol Reactions of 1,3-Bis-Silyl Enol Ethers with 3-Acyl- and 3-Formylbenzopyrylium Triflates – Synthesis of Functionalised 2,4′-Dihydroxybenzophenones
3-bis-silyl enol ethers with 3-acyl- and 3-formylbenzopyrylium triflates, which can be generated in situ from 3-acyl- and 3-formylchromones, affords a great variety of functionalised 2,4′-dihydroxybenzophenones and 4-(2-hydroxybenzoyl)salicylates. These products are formed by a domino Michael/retro-Michael/Mukaiyama-aldol reaction. This methodology is successfully applied to the synthesis of novel UV-A/B and