Schiff bases as external and internal electrophiles in reactions of functionalized organolithium reagents. A new route to isoindoline derivatives and 1,2,3,4-tetrahydroisoquinolines
Photoinduced, Copper-Catalyzed Decarboxylative C–N Coupling to Generate Protected Amines: An Alternative to the Curtius Rearrangement
作者:Wei Zhao、Ryan P. Wurz、Jonas C. Peters、Gregory C. Fu
DOI:10.1021/jacs.7b07546
日期:2017.9.6
classic, powerful method for converting carboxylic acids into protected amines, but its widespread use is impeded by safety issues (the need to handle azides). We have developed an alternative to the Curtius rearrangement that employs a copper catalyst in combination with blue-LED irradiation to achieve the decarboxylativecoupling of aliphatic carboxylic acid derivatives (specifically, readily available
Curtius 重排是将羧酸转化为受保护胺的经典、强大的方法,但其广泛使用受到安全问题(需要处理叠氮化物)的阻碍。我们开发了 Curtius 重排的替代方案,它采用铜催化剂与蓝光 LED 照射相结合,实现脂肪族羧酸衍生物(特别是容易获得的 N-羟基邻苯二甲酰亚胺酯)的脱羧偶联,在温和条件下提供受保护的胺。这种 CN 键形成过程与多种官能团兼容,包括醇、醛、环氧化物、吲哚、硝基烷烃和硫化物。控制反应和机理研究与铜物种参与光化学和关键键形成步骤的假设一致,
One‐Pot Substitution of Aliphatic Alcohols Mediated by Sulfuryl Fluoride
作者:Jia Yi Mo、Maxim Epifanov、Jack W. Hodgson、Rudy Dubois、Glenn M. Sammis
DOI:10.1002/chem.202000721
日期:2020.4.16
activation and substitution of aliphaticalcohols. Significant efforts have focused on modifying the classic conditions to overcome problems associated with purification from phosphine-based by-products. Herein, we report a phosphine free method for alcohol activation and substitution that is mediated by sulfuryl fluoride. This new method is effective for a wide range of primary alcohols using phthalimide
One-Pot Cascade Trifluoromethylation/Cyclization of Imides: Synthesis of α-Trifluoromethylated Amine Derivatives
作者:Vinay Kumar Pandey、Pazhamalai Anbarasan
DOI:10.1021/jo5002998
日期:2014.5.2
Tryptamine- and phenethylamine-derived imides were selectively monotrifluoromethylated using CF3TMS. Subsequent methanesulfonic acid mediated cyclization of the intermediate hemiaminals afforded the alpha-trifluoromethylated amine derivatives via the formation of trifluoromethylated acyliminium ions, in one pot. The strategy was applicable to the both inter- and intramolecular versions. Furthermore, the utility of the present method was demonstrated through the synthesis of trifluoromethylated analogues of harmicine and crispine A.
BRADSHER C. K.; HUNT D. A., J. ORG. CHEM., 1981, 46, NO 2, 327-330
作者:BRADSHER C. K.、 HUNT D. A.
DOI:——
日期:——
Schiff bases as external and internal electrophiles in reactions of functionalized organolithium reagents. A new route to isoindoline derivatives and 1,2,3,4-tetrahydroisoquinolines