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。
Blends of quinone alkide and nitroxyl compounds and polymerization inhibitors
申请人:——
公开号:US20040010159A1
公开(公告)日:2004-01-15
Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of: A) at least one nitroxyl compound, and B) at least one quinone alkide compound having an electron-withdrawing group at the 7-position. Additionally, a composition is disclosed that comprises: A) at least one nitroxyl compound, and B) at least one quinone alkide compound having an electron-withdrawing group at the 7-position.
Blends of quinone alkide and nitroxyl compounds as polymerization inhibitors
申请人:Benage Brigitte
公开号:US20060155140A1
公开(公告)日:2006-07-13
Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of: A) at least one nitroxyl compound, and B) at least one quinone alkide compound having an electron-withdrawing group at the 7-position. Additionally, a composition is disclosed that comprises: A) at least one nitroxyl compound, and B) at least one quinone alkide compound having an electron-withdrawing group at the 7-position.
本文公开了一种抑制乙烯基不饱和单体过早聚合的方法,该方法包括向所述单体中添加有效量的以下物质:A) 至少一种硝基化合物,和 B) 至少一种醌烷化合物,该化合物在 7 位上具有抽电子基团。此外,还公开了一种组合物,它包括A) 至少一种硝基化合物,和 B) 至少一种在 7 位上具有抽电子基团的醌烷化合物。
US06017918
申请人:——
公开号:——
公开(公告)日:——
BLENDS OF QUINONE ALKIDE AND NITROXYL COMPOUNDS AS POLYMERIZATION INHIBITORS