Pd complexes have been used in catalytic conversion of primary and secondary amines into isocyanates or carbamoyl chlorides, respectively. The latter have been used as intermediates for the synthesis of carbamates and ureas. The palladium-based catalytic system is very active and operates in two steps, avoiding the synthesis of phosgene (COCl2), but making use of CO and Cl2 as in phosgene chemistry
                                    Pd络合物已分别用于将
伯胺和仲胺催化转化为
异氰酸酯或
氨基
甲酰氯。后者已用作合成
氨基甲酸酯和
脲的中间体。
钯基催化系统非常活跃,分两步运行,避免了
光气(COCl 2)的合成,但在
光气化学中却使用了CO和Cl 2。在第一步中,
钯(II)络合物PdCl 2 L 2 [L 2 = 2,2'二
吡啶(dipy)或1,10-
菲咯啉(phen);L =
三苯基膦(PPh 3)]与胺[NH 2 R,R = n -C 3 H 7(a),n -C 4 H 9(b),n -C 5 H 11(c);NHRR' , NRR'= CH 2(CH 2)4 N(d),CH 2(CH 2 OCH 2)CH 2 N(e)]和CO生成
氨基甲酰基复合物PdCl(CONHR)L 2和PdCl (2 - X)(CONRR')X大号2(X = 1,2)。当
伯胺为NH使用2 R,(a,b和c),仅单
氨基甲酰基络合物[PdCl(CONHR)(dipy)(1a