A One-Pot Azido Reductive Tandem Mono-N-Alkylation Employing Dialkylboron Triflates: Online ESI-MS Mechanistic Investigation
作者:Nagula Shankaraiah、Nagula Markandeya、Vunnam Srinivasulu、Kokkonda Sreekanth、Ch. Sanjeeva Reddy、Leonardo S. Santos、Ahmed Kamal
DOI:10.1021/jo200931m
日期:2011.9.2
mono-N-alkylation of both aromatic and aliphatic azides using dialkylboron triflates as alkylating agents has been examined under standardized reaction conditions. This methodology after optimization has been employed toward the syntheses of various secondary alkyl as well as aryl amines, including the synthesis of N10-butylated pyrrolo[2,1-c][1,4]benzodiazepine-5,11-diones via in situ azido reductive-cyclization
在标准反应条件下,已经研究了使用二烷基硼三氟甲磺酸酯作为烷基化剂的芳香族和脂肪族叠氮化物的有效一锅还原串联单-N-烷基化反应。优化后的该方法已用于合成各种仲烷基以及芳基胺,包括合成N10丁基化吡咯并[2,1- c通过原位叠氮基还原环化过程得到] [1,4]苯并二氮杂-5,11-二酮。该协议特别吸引人,它提供了一种环境友好且实用的方法,可用于从有机叠氮化物进行单N-烷基化而无需使用有毒催化剂或腐蚀性烷基化剂。另外,已经研究了机理方面,并且通过ESI-MS / MS在线监测反应来拦截和表征了与该选择性转化有关的中间体。