<i>tert</i>-Butyl Nitrite-Mediated Synthesis of <i>N</i>-Nitrosoamides, Carboxylic Acids, Benzocoumarins, and Isocoumarins from Amides
作者:Subhash L. Yedage、Bhalchandra M. Bhanage
DOI:10.1021/acs.joc.7b00570
日期:2017.6.2
(TBN) as a multitask reagent for (1) the controlled synthesis of N-nitrosoamide from N-alkyl amides, (2) hydrolysis of N-methoxyamides to carboxylic acids, (3) metal- and oxidant-free benzocoumarin synthesis from ortho-aryl-N-methoxyamides via N–H, C–N, and C–H bond activation, and (4) isocoumarin synthesis using Ru(II)/PEG as a recyclable catalytic system via ortho-C–H activation and TBN as an oxygen source
这项工作报告了亚硝酸叔丁酯(TBN)作为多任务试剂,用于(1)从N-烷基酰胺可控地合成N-亚硝基酰胺;(2)N-甲氧基酰胺水解为羧酸;(3)金属和氧化剂-free苯并香豆素合成从邻-芳基- ñ经由N-H,C-N和C-H键活化,和(4)异香豆素合成使用的Ru(II)/ PEG经由可回收催化体系-methoxyamides邻-C–H活化和TBN作为氧气源。还使用红外光谱分析检查了酰胺向酸的顺序官能团互变。另外,由于反应时间短,克级合成和广泛的底物范围,该方法学是非常有利的。