氨基甲酸芳基酯用于氨的镍催化单芳基化。应用的、定义明确的单组分镍 (II) 预催化剂包含 Josiphos 配体,在空气中稳定,并且无需任何辅助还原剂即可运行。该催化剂体系还促进了氨基甲酸芳基酯与硫酸铵以及伯烷基胺的盐酸盐的胺化。它们的容易制备、稳健性和导向基团能力使氨基甲酸芳基酯成为特别有吸引力的合成中间体。
PEDERSEN, E. B.;CARLSEN, D., CHEM. SCR., 1981, 18, N 5, 240-241
作者:PEDERSEN, E. B.、CARLSEN, D.
DOI:——
日期:——
A Three-Component Approach to 3,5-Diaryl-1,2,4-thiadiazoles under Transition-Metal-Free Conditions
作者:Hao Xie、Jinhui Cai、Zilong Wang、Huawen Huang、Guo-Jun Deng
DOI:10.1021/acs.orglett.6b00806
日期:2016.5.6
A novel route is disclosed for the synthesis of 1,2,4-thiadiazoles starting from amidines, elementalsulfur, and 2-methylquinolines or aldehydes under transition-metal-free conditions. This three-component approach affords efficient and rapid access to 3,5-diaryl substituted 1,2,4-thiadiazoles with good tolerance of a broad range of funcitional groups. Mechanistic studies reveal a radical-involved
Aryl carbamates were employed in the nickel-catalyzed monoarylation of ammonia. The applied, well-defined single-component nickel(II) precatalyst contains a Josiphos ligand, is air-stable, and operates without any ancillary reductant. This catalyst system also promotes the amination of aryl carbamates with ammonium sulfate as well as with hydrochloride salts of primary alkylamines. Their easy preparation
氨基甲酸芳基酯用于氨的镍催化单芳基化。应用的、定义明确的单组分镍 (II) 预催化剂包含 Josiphos 配体,在空气中稳定,并且无需任何辅助还原剂即可运行。该催化剂体系还促进了氨基甲酸芳基酯与硫酸铵以及伯烷基胺的盐酸盐的胺化。它们的容易制备、稳健性和导向基团能力使氨基甲酸芳基酯成为特别有吸引力的合成中间体。