Process for the preparation of alpha-aminosubstituted carboxylic acid amides
申请人:——
公开号:US20040034250A1
公开(公告)日:2004-02-19
The invention relates to a process for the preparation of &agr;-aminosubstituted carboxylic acid amide compounds and/or their salts comprising reacting a carboxylic acid amide of a primary amine with a nitrosylating agent in the presence of a base followed by hydrolysis to give a hydroxy imino derivative followed by hydrogenation and if necessary converting a base or acid of the &agr;-aminosubstituted carboxylic acid amide into one of its salts.
Indium metal as a reducing agent in organic synthesis
作者:Michael R. Pitts、Justin R. Harrison、Christopher J. Moody
DOI:10.1039/b101712h
日期:——
aromatic nitrocompounds under similar conditions results in selectivereduction of the nitro groups; ester, nitrile, amide and halide substituents are unaffected. Likewise indium in aqueous ethanolic ammonium chloride is an effective method for the deprotection of 4-nitrobenzyl ethers and esters. Indium is also an effective reducing agent under non-aqueous conditions and α-oximino carbonyl compounds can
A novel strategy to the synthesis of 4-anilinoquinazoline derivatives
作者:Zheng Wang、Cuiling Wang、Yanni Sun、Ning Zhang、Zhulan Liu、Jianli Liu
DOI:10.1016/j.tet.2013.12.028
日期:2014.1
A novel approach to prepare 4-anilinoquinazoline derivatives based on the transformation of indoline-2,3-dione to formamidine was developed. The processes with this approach are simple, efficient, and environmentally friendly. The efficiency of this approach was evaluated by synthesizing 17 4-anilinoquinazolines and comparing the obtained yields with those achievable through conventional synthetic
Syntheses of gem-dinitro heterocyclic compounds, their ring-opening reactions and transformations into indoles, indazoles and benzoxazinones
作者:Jan Bergman、Solveig Bergman、Thomas Brimert
DOI:10.1016/s0040-4020(99)00570-0
日期:1999.8
The synthesis of some novel 3,3,5,7-tetranitrooxindoles and 4,4-dinitropyrazol-5-ones and their behaviour towards various nucleophiles and electrophiles are reported. Reactions with hydroxide ions or secondary amines produced salts of e.g. 2-amino-3,5-dinitrophenyldinitromethane, which subsequently could be further transformed into indazoles, indoles or benzoxazinones depending upon substrate and conditions