with α-amino acid esters, with α-hydroxy acid hydrazides and with α-amino acid hydrazides, respectively. Diaminocarbene—palladium(II) complexes, which are involved as key intermediates in these heterocycle syntheses, were isolated and characterized. Diaminocarbene—palladium(II) complexes, which are prepared from PdCl2(t-C4H9NC)2 and β-aminoalcohols, such as methyl threonate and o-aminophenol, were reacted
咪唑酮,二氢恶二嗪酮和四氢
三嗪酮是通过PdCl 2催化的异腈与
α-氨基酸酯,α-羟基酰
肼和
α-氨基酸酰
肼反应而合成的。分离并表征了作为这些杂环合成中关键中间体的二
氨基卡宾-
钯(II)配合物。由PdCl 2(tC 4 H 9 NC)2和β-
氨基醇(如苏糖酸甲酯和邻
氨基苯酚)制得的二
氨基碳烯-
钯(II)配合物与Ag 2 O反应,得到(N-叔丁基亚
氨基)
恶唑烷。