Regioselective ortho-hydroxylation of aryl moiety of 2-arylpyridines using Pd(OAc)2/Oxone in PEG-3400/tert-BuOH
摘要:
Regioselective ortho-hydroxylation of aryl moiety of 2-arylpyridines was carried out under the influence of Pd(OAc)(2)/Oxone (potassium peroxymonosulfite) in PEG-3400/t-BuOH in moderate yields. (C) 2008 Elsevier Ltd. All rights reserved.
Regioselective synthesis of 1,2,4,5-tetrasubstituted pyridines from Baylis–Hillman adducts via consecutive [3+2+1] annulation protocol
作者:Sung Hwan Kim、Ko Hoon Kim、Hoo Sook Kim、Jae Nyoung Kim
DOI:10.1016/j.tetlet.2008.01.110
日期:2008.3
An efficient synthetic method of poly-substituted pyridines was developed. Various poly-substituted pyridines were prepared from the combination of Baylis–Hillmanadducts (3 carbons), activated methylene compounds (2 carbons) and ammonium acetate (1 nitrogen) via [3+2+1] annulation protocol in good yields, regioselectively.
beta-unsaturated oximes and internalalkynes has been developed using [Cp*RhCl2](2)-CsOPiv as the catalyst system. The present transformation is carried out by a redox-neutral sequence of vinylic C-H rhodation, alkyne insertion, and C-N bond formation of the putative vinyl rhodium intermediate with the oxime nitrogen, where the N-Obond of oxime derivatives could work as an internaloxidant to maintain the catalytic
使用 [Cp*RhCl2](2)-CsOPiv 作为催化剂体系开发了一种从 α、β-不饱和肟和内部炔烃合成高度取代的吡啶的方法。目前的转化是通过乙烯基 CH 化、炔插入和 CN 键形成的氧化还原中性序列与肟氮形成推定的乙烯基铑中间体,其中肟衍生物的 NO 键可以作为内部氧化剂来维持催化循环。
Regioselective ortho-hydroxylation of aryl moiety of 2-arylpyridines using Pd(OAc)2/Oxone in PEG-3400/tert-BuOH
作者:Sung Hwan Kim、Hyun Seung Lee、Se Hee Kim、Jae Nyoung Kim
DOI:10.1016/j.tetlet.2008.07.141
日期:2008.10
Regioselective ortho-hydroxylation of aryl moiety of 2-arylpyridines was carried out under the influence of Pd(OAc)(2)/Oxone (potassium peroxymonosulfite) in PEG-3400/t-BuOH in moderate yields. (C) 2008 Elsevier Ltd. All rights reserved.