Mechanistic Insights on the Functionalization of CO
<sub>2</sub>
with Amines and Hydrosilanes Catalyzed by a Zwitterionic Iridium Carboxylate‐Functionalized Bis‐NHC Catalyst
作者:Ana I. Ojeda‐Amador、Julen Munarriz、Pablo Alamán‐Valtierra、Víctor Polo、Raquel Puerta‐Oteo、M. Victoria Jiménez、Francisco J. Fernández‐Alvarez、Jesús J. Pérez‐Torrente
DOI:10.1002/cctc.201901687
日期:2019.11.21
pressure (3 bar) the formamide derivative was obtained as major reaction product. The unexpected formation of pyrrolidin‐1‐ium formate as intermediate of the reaction the 1‐catalyzed of CO2 with pyrrolidine and HSiMe2Ph has been observed, and its role in the formation of 1‐formylpyrrolidine rationalized. Moreover, a mechanism for the reaction of CO2 with hydrosilanes, in the presence and in the absence
First catalyst-free CO<sub>2</sub>trapping of<i>N</i>-acyliminium ions under ambient conditions: sustainable multicomponent synthesis of thia- and oxazolidinyl carbamates
carbon dioxide (CO2) and amine) is reported. This catalyst-free reaction provides a convenient and feasible approach to prepare N-acyl thia- and oxazolidinyl carbamates with good functional-group compatibility and high efficiency under green conditions. Furthermore, the multicomponent method features a broad substrate scope, facile product diversification, smooth scale-up and notable potential for polymer
Substituted azole derivatives as therapeutic agents
申请人:——
公开号:US20040186151A1
公开(公告)日:2004-09-23
This invention provides azoles which may be useful as inhibitors of protein tyrosine phosphatases (PTPases). The present invention provides compounds of Formula (I), methods of their preparation, pharmaceutical compositions comprising the compounds and their use in treating human or animal disorders. The compounds of the invention may be useful as inhibitors of protein tyrosine phosphatases and thus can be useful for the management, treatment, control and adjunct treatment of diseases mediated by PTPase activity. Such diseases include Type I diabetes, Type II diabetes.
Efficient catalyst-free direct amidation of non-activated carboxylic acids from carbodiimides
作者:Mehmet Mart、Janusz Jurczak、Idris Karakaya
DOI:10.1039/d2ob01322c
日期:——
A novel and efficient catalyst- and activating agent-free amidationmethod via direct amidation of carboxylic acids where carbodiimides act as a reagent instead of an activating agent is reported. The reaction is conducted under non-traditional coupling conditions where a higher temperature is employed. Besides not using stoichiometric ratios of activating agent or catalyst, this approach is made even