Synthesis of Symmetric 1,4-Diamino-2-Butynes via a Cu(I)-Catalyzed One-Pot A<sup>3</sup>-Coupling/Decarboxylative Coupling of a Propiolic Acid, an Aldehyde, and an Amine
作者:Huangdi Feng、Denis S. Ermolat’ev、Gonghua Song、Erik V. Van der Eycken
DOI:10.1021/jo300562j
日期:2012.6.1
A novel microwave-assisted approach for the one-pot Cu(I)-catalyzed A3-coupling/decarboxylative coupling (PA2-coupling) of a propiolicacid, an aldehyde, and an amine, resulting in the formation of diversely substituted 1,4-diamino-2-butynes,is described. It is noteworthy that this new multicomponent coupling provides an efficient access to introduce alkyl and aryl group at the 1,4-position of the
Facile synthesis of 1,4-benzodiazepin-3-ones from o-bromobenzylamines and amino acids via a cascade coupling/condensation process
作者:Hexiang Wang、Yongwen Jiang、Kun Gao、Dawei Ma
DOI:10.1016/j.tet.2009.06.104
日期:2009.10
with DPPA) provides 1,4-benzodiazepin-3-ones in moderate yields. Using l-proline and l-valine as the starting materials enantiopure products are obtained although partial racemization occurs for other amino acids.
A direct approach to 2-(aminomethyl)indoles by copper-catalyzed domino three-component coupling−cyclization of 2-ethynylanilines with a secondary amine and aldehyde has been developed. By use of a cyclic or acyclic secondary amine and aldehyde (paraformaldehyde, aliphatic or aromatic aldehydes) in the presence of 1 mol % of CuBr, 2-ethynylanilines were converted to a variety of substituted 2-(aminomethyl)indoles
通过铜催化的2-乙炔基苯胺与仲胺和醛的多米诺三组分偶联-环化反应,已开发出直接方法用于2-(氨基甲基)吲哚。通过在1摩尔%的CuBr存在下使用环状或无环仲胺和醛(低聚甲醛,脂肪族或芳香族醛),将2-乙炔基苯胺以良好的收率转化为各种取代的2-(氨基甲基)吲哚。利用该多米诺反应和吲哚C-3位的CH官能化,可以轻松合成多环吲哚。还介绍了通过磺酰胺和丙二酸酯同类物的反应来构建苯并[ e ] [1,2]噻嗪和茚基图案。
Gold-catalyzed efficient synthesis of azepan-4-ones via a two-step [5 + 2] annulation
作者:Li Cui、Longwu Ye、Liming Zhang
DOI:10.1039/c001314e
日期:——
A surprisingly efficient synthesis of azepan-4-ones via a two-step [5â+â2] annulation is developed. This reaction involves a key gold catalysis and shows generally high regioselectivities and good to excellent diastereoselectivities.
Regioselective Cu(I)-Catalyzed Tandem A<sup>3</sup>-Coupling/Decarboxylative Coupling to 3-Amino-1,4-Enynes
作者:Huangdi Feng、Denis S. Ermolat’ev、Gonghua Song、Erik V. Van der Eycken
DOI:10.1021/ol3006612
日期:2012.4.6
An efficient and novel copper-mediated protocol for the synthesis of 3-amino-1,4-enynes from glyoxylic acid, an amine, and an alkyne was developed. This new reaction involving two sequential C-C bond formations is air and moisture tolerant and proceeds via a tandem A(3)-coupling and a selective decarboxylative coupling.