Phosphine-Catalyzed Intermolecular Dienylation of Alkynoate with <i>para</i>-Quinone Methides
作者:Zefeng Song、Weijia Wang、Zhixin Liu、Yue Lu、De Wang
DOI:10.1021/acs.joc.1c00226
日期:2021.7.2
An interesting remote δ-C 1,6-addition and an isomerization cascade reaction for phosphine-catalyzed activated alkynes have been disclosed. The products featuring a functional diene and a 1,1-diaryl methyl motif have been obtained in moderate to good yields (30–86%) by applying para-quinone methides (p-QMs) and δ-substituted alkynoate with tributylphosphine (PnBu3) catalysis, along with high regioselectivity
已经公开了一种有趣的远程 δ-C 1,6-加成和膦催化的活化炔烃的异构化级联反应。通过应用对醌甲基化物 ( p -QMs) 和 δ-取代的炔酸酯与三丁基膦 (P n Bu 3 ) 催化,以及高区域选择性和立体选择性(dr > 20:1)。广泛的兼容底物(35 个示例),例如吲哚基、羟吲哚基、酯和肉桂基,扩展了该方法的实用性。还介绍了一种合理的机制及其一些应用。
7-substituted quinone methides as inhibitors for unsaturated monomers
申请人:Ciba-Geigy Corporation
公开号:US05583247A1
公开(公告)日:1996-12-10
Ethylenically unsaturated monomers are protected from premature polymerization during manufacture and storage by the incorporation therein of an effective stabilizing amount of a 7-substituted quinone methide compound.
Easy Large Scale Syntheses of 2,6-DI-<i>t</i>-Butyl- 7-Cyano-, 7-Carboxy-<i>and</i>7-Methoxycarbonyl Quinone Methides
作者:Peter Nesvadba
DOI:10.1080/00397910008086909
日期:2000.8
Easy large scale syntheses of 2, 6-di-t-butyl-7-cyano-, 7-carboxy- and 7-methoxycarbonyl quinone methides 1-3 using cheap and readily available starting materials have been developed.
7-Substituted quinone methides as inhibitors for unsaturated monomers