An efficient FeCl3-catalyzed amidation reaction of secondary benzylic and allylic alcohols with carboxamides or p-toluenesulfonamide
作者:Umasish Jana、Sukhendu Maiti、Srijit Biswas
DOI:10.1016/j.tetlet.2007.11.176
日期:2008.1
A simple, inexpensive, environmentally friendly and high yielding amidationreaction of benzylic and allylic alcohols with primary amides using a catalytic amount of FeCl3 (5 mol %) is described. Direct substitution of various amides such as benzamide, sulfonamide, acetamide and acrylamide is reported, and this method also works on a large scale in high yield.
Metal-free synthesis of allylic amines by cross-dehydrogenative-coupling of 1,3-diarylpropenes with anilines and amides under mild conditions
作者:Zhiming Wang、Hanjie Mo、Dongping Cheng、Weiliang Bao
DOI:10.1039/c2ob06826e
日期:——
Dehydrogenative cross-coupling reaction of primary anilines, secondary anilines, carboxamides, and sulfonamides with 1,3-diarylpropenes to form a series of allylic amines promoted by DDQ have been realized. Both monoallylation and diallylation products can be selectively synthesized when primary anilines are used as the starting materials. The method may provide a wide scope of allylamines in scientific research including biologically active compound library construction.
Molecular iodine-catalysed amidation reaction of secondary benzylic and allylic alcohols with carboxamides or sulfonamides
作者:Xufeng Lin、Jun Wang、Fangxi Xu、Yanguang Wang
DOI:10.3184/030823409x12526892025900
日期:2009.10
molecular iodine-catalysed amidationreaction of benzylic and allylic alcohols with carboxamides or sulfonamides in MeCN is described, giving the corresponding substituted amides and allylic amides in moderate to excellent yields. The significan features of the procedure include mild and metal-free reaction conditions, operational simplicity, inexpensive reagents, short reaction time, and good yields.
Sulfonic Acid-Functionalized Ionic Liquids as Metal-Free, Efficient and Reusable Catalysts for Direct Amination of Alcohols
作者:Feng Han、Lei Yang、Zhen Li、Chungu Xia
DOI:10.1002/adsc.201100886
日期:2012.4.16
the direct amination of alcohols. Notably, the activities of the series of SO3H‐functionalized ionic liquids were compared and a 92% isolated yield was obtained using 3‐tetradecyl‐1‐(butyl‐4‐ sulfonyl)imidazolium trifluoromethanesulfonate ([BsTdIM][OTf]) as the catalyst. Importantly, the catalytic system has wide substrate scope including benzylic, allyl, propargylic, aliphatic alcohols with sulfonamide
合成了一系列磺酸官能化(SO 3 H官能化)的离子液体,并将其用作无金属,高选择性和高效的催化剂,用于醇的直接胺化。值得注意的是,SO 3系列的活动比较了H-官能化的离子液体,并使用3-十四烷基-1-(丁基-4-磺酰基)咪唑三氟甲磺酸盐([BsTdIM] [OTf])作为催化剂,可分离出92%的产率。重要的是,催化体系具有广泛的底物范围,包括苄基,烯丙基,炔丙基,带有磺酰胺的脂族醇,酰胺,氨基甲酸酯,芳族胺和N杂环化合物。有趣的是,该系统还适用于几克规模的酒精直接胺化。此外,[BsTdIM] [OTf]的可重用性质使该协议更具吸引力,并且避免了酸性催化剂的处理和中和。此外,初步实验表明该反应应通过S N 1途径进行。