作者:Yulei Wang、Zhipeng Lin、João C. A. Oliveira、Lutz Ackermann
DOI:10.1021/acs.joc.1c00682
日期:2021.11.19
The oxidative intermolecular nitrogenation of C(sp3)–H bonds represents one of the most straightforward strategies to construct nitrogen-containing molecules. However, a sacrificial chemical oxidant is generally required. Herein, we describe electrochemical oxidative intermolecular allylic C(sp3)–Haminations in an undivided cell by electric current. The cross-dehydrogenative amination proceeded efficiently
C(sp 3 )-H 键的氧化分子间氮化代表了构建含氮分子的最直接的策略之一。然而,通常需要牺牲化学氧化剂。在此,我们通过电流描述了未分割电池中的电化学氧化分子间烯丙基 C(sp 3 )-H 胺化。在无金属和无化学氧化剂的反应条件下,交叉脱氢胺化反应在大范围内有效进行,得到分子 H 2作为唯一的副产物。
Towards efficient conversion of allylalcohol into value‐added compounds: The first examples of zeolite‐catalyzed substitution of the hydroxy group in allylalcohols with nucleophiles were developed. The zeolite‐catalyzed substitution reaction is broadly adaptable to substrates under relatively mild reaction conditions.
Efficient ZnBr2-catalyzed reactions of allylic alcohols with indoles, sulfamides and anilines under high-speed vibration milling conditions
作者:Guang-Peng Fan、Zi Liu、Guan-Wu Wang
DOI:10.1039/c3gc40262b
日期:——
Solvent-free reactions of allylic alcohols with various nucleophiles including indoles, sulfamides and anilines were efficiently achieved in the presence of 20% ZnBr2 under high-speed vibration milling conditions, and the products were obtained in good to excellent yields with the formation of water as the only byproduct.
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。