Three-Component Domino Reaction of Thioamide, Isonitriles, and Water: Selective Synthesis of 1,2,4-Thiadiazolidin-3-ones and (<i>E</i>)-<i>N</i>-(1,2-Diamino-2-thioxoethylidene)benzamides
作者:Zhi-Wei Xi、Yan He、Li-Qiu Liu、Ying-Chun Wang、Hui-Ying Zeng
DOI:10.1021/acs.joc.2c01969
日期:——
The three-component domino reaction of thioamides, benzyl isocyanide, and water in the presence of a catalytic amount of both Pd(dppf)Cl2 and Cu(OAc)2 afforded novel 1,2,4-thiadiazolidin-3-one cyclic compounds, whereas the same reaction with tertiary alkylisonitriles in the presence of rare earth metal salt [La(OTf)3] resulted in (E)-N-(1,2-diamino-2-thioxoethylidene)benzamide open-chain products.
在催化量的 Pd(dppf)Cl 2和 Cu(OAc) 2存在下,硫代酰胺、苄基异氰化物和水的三组分多米诺反应提供了新型 1,2,4-thiadiazolidin-3-one 环状化合物,而在稀土金属盐[La(OTf) 3 ]存在下与叔烷基异腈的相同反应产生( E ) -N- (1,2-二氨基-2-硫代亚乙基)苯甲酰胺开链产物。这种发散反应能够一锅法构建五个(N-S、C-S、C-O 和两个 C-N)或四个(C-S、C-N、C-O 和 C-C)新的化学键。机理研究表明产物的氧原子来源于H 2 O。