Efficient and selective N-alkylation of carbamates in the presence of Cs2CO3 and TBAI
摘要:
Mild and selective N-alkylation of carbamates was carried our in the presence of cesium carbonate, tetra-butylammonium iodide (TBAI), and a halide. This protocol was highly selective and efficient, offering aliphatic and aromatic N-alkyl carbamates exclusively in high yields. (C) 2001 Published by Elsevier Science Ltd.
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
Efficient and selective N-alkylation of carbamates in the presence of Cs2CO3 and TBAI
作者:Ralph N Salvatore、Seung Il Shin、Vincent L Flanders、Kyung Woon Jung
DOI:10.1016/s0040-4039(01)00019-3
日期:2001.3
Mild and selective N-alkylation of carbamates was carried our in the presence of cesium carbonate, tetra-butylammonium iodide (TBAI), and a halide. This protocol was highly selective and efficient, offering aliphatic and aromatic N-alkyl carbamates exclusively in high yields. (C) 2001 Published by Elsevier Science Ltd.
Catalytic dehydrogenative N-((triisopropylsilyl)oxy)carbonyl (Tsoc) protection of amines using iPr<sub>3</sub>SiH and CO<sub>2</sub>
作者:S. Tanaka、T. Yamamura、S. Nakane、M. Kitamura
DOI:10.1039/c5cc04594k
日期:——
Heterogeneous Pd/C efficiently catalyzes the dehydrogenative N-((triisopropylsilyl)oxy)carbonyl (Tsoc) protection of amines using iPr3SiH and CO2 without the liberation of any salts.