AN EFFICIENT ONE POT SYNTHESIS OF CARBAMATE ESTERS THROUGH ALCOHOLIC TOSYLATES*
摘要:
An efficient O-alkylation of alcoholic tosylates with amines in a K2CO3/CO2 system in the presence of tetrabutyl ammonium iodide (TBAI) provides exclusive formation of carbamates.
Efficient Cs2CO3-promoted solution and solid phase synthesis of carbonates and carbamates in the presence of TBAI
作者:Ralph N Salvatore、Feixia Chu、Advait S Nagle、Elona A Kapxhiu、Richard M Cross、Kyung Woon Jung
DOI:10.1016/s0040-4020(02)00286-7
日期:2002.4
Novel solution and solid-phase methods for the synthesis of carbonates and carbamates were developed using cesium bases and TBAI via a three-component coupling. Cesium carbonate not only promoted successful carbonylations of alcohols and carbamations of amines, but also suppressed common side reactions traditionally seen using existing protocols. Various alcohols and amines were examined, using a wide
A high yielding one-pot, novel synthesis of carbamate esters from alcohols using Mitsunobu's reagent
作者:Devdutt Chaturvedi、Atul Kumar、S Ray
DOI:10.1016/j.tetlet.2003.08.018
日期:2003.10
A novel process for the one-step conversion of primary alcohols into carbamates as protected amines has been developed usingMitsunobu's reagent in the presence of gaseous carbon dioxide. Thus, carbamate esters of the different amines were prepared in very good to excellent yields.
A novel Mitsunobu -based protocol was developed for the synthesis of carbamates from the corresponding alcohols using carbon dioxide and amines in good to excellent yields. This protocol is mild, chemoselective, and efficient compared to other reported methods.
Triton-B Catalyzed, Efficient, One-Pot Synthesis of Carbamate Esters from Alcoholic Tosylates
作者:Devdutt Chaturvedi、Suprabhat Ray
DOI:10.1007/s00706-005-0452-2
日期:2006.4
A novel process for the one-step chemoselective conversion of a variety of alcoholic tosylates into carbamates serving as protected an-fines was developed using benzyltrimethylammonium hydroxide (Triton-B) in the presence of gaseous carbon dioxide. Thus carbamate esters of different amines were prepared in very good to excellent yields.
A High Yielding, One-Pot, Triton-B Catalyzed, Expeditious Synthesis of Carbamate Esters by Four Component Coupling Methodology
作者:Devdutt Chaturvedi、S. Ray
DOI:10.1007/s00706-005-0417-5
日期:2006.2
A novel process for the one-step chemoselective conversion of alkyl halides into carbamates as protected amines was developed using benzyltrimethylammonium hydroxide (Triton-B) in presence of gaseous carbon dioxide. Thus, carbamate esters of different amines were prepared in very good to excellent yields.