1279872-94-4Relevant academic research and scientific papers
Batch and Continuous-Flow One-Pot Processes using Amine Diazotization to Produce Silylated Diazo Reagents
Audubert, Clément,Gamboa Marin, Oscar Javier,Lebel, Hélène
, p. 6294 - 6297 (2017)
A novel synthesis of trimethylsilyldiazomethane (TMSCHN2) by diazotization of trimethylsilylmethylamine (TMSCH2NH2) is reported using batch and continuous flow synthesis. The latter affords a daily production of 275 g (2.4 mol) of TMSCHN2. Other silylated methylamines were also successfully reacted under the developed reaction conditions to furnish various silicon-bearing diazomethane reagents. The applicability of the process is highlighted by disclosure of batch and continuous flow one-pot esterification and 1,3-dipolar cycloaddition processes. Furthermore, the high-yielding esterification of carboxylic acids with silylated and substituted methylamines in continuous flow is disclosed. Finally, work-up and purification procedures are reported for the preparation of a 2-MeTHF solution of TMSCHN2, which can be used in rhodium-catalyzed methylenation and homologation reactions.
Ligand-free copper-catalyzed one-pot synthesis of indole-2-carboxylic esters
Zhu, Zhiqiang,Yuan, Jiangjun,Zhou, Yirong,Qin, Yang,Xu, Jingshi,Peng, Yiyuan
supporting information, p. 511 - 514 (2014/02/14)
A simple, efficient, and facile synthetic route for the preparation of indole-2-carboxylic esters was described. The cascade reactions of 2-bromobenzaldehyde and glycine ester hydrochloride were promoted by Cu 2O and a base to provide the corresponding products in good yields. Commercially available, inexpensive substrates and reagents were employed under mild reaction conditions in this one-pot operation, which is complementary to existing methods for access to 2-substituted indoles. A simple, efficient, and facile synthetic route to indole-2-carboxylic esters through copper-catalyzed one-pot cascade reactions of commercially available, inexpensive 2-bromobenzaldehyde and glycine ester hydrochloride without the use of any external ligand under mild conditions is reported. Copyright
Ligand-Free Copper-Catalyzed One-Pot Synthesis of Indole-2-carboxylic Esters
Zhu, Zhiqiang,Yuan, Jiangjun,Zhou, Yirong,Qin, Yang,Xu, Jingshi,Peng, Yiyuan
supporting information, p. 511 - 514 (2015/10/05)
A simple, efficient, and facile synthetic route for the preparation of indole-2-carboxylic esters was described. The cascade reactions of 2-bromobenzaldehyde and glycine ester hydrochloride were promoted by Cu2O and a base to provide the corresponding products in good yields. Commercially available, inexpensive substrates and reagents were employed under mild reaction conditions in this one-pot operation, which is complementary to existing methods for access to 2-substituted indoles.
