Urethanes are prepared by oxidative carbonylation of at least one amino compound in the presence of carbon monoxide, oxygen and organic, at least one hydroxyl-group-carrying compound. The carbonylation is carried out in the absence of halogen-containing promoters. The carbonylation is also carried out in the presence of a metal complex catalyst which contains neutral bidentate N-chelate ligands of the (N˜N) type, two monoanionic N,O-chelate ligands of the general type (N˜O)
−
or tetradentate dianionic chelate ligands (O˜N˜N˜O)
2−
.
聚
氨酯是通过氧化羰基化至少一种
氨基化合物来制备的,在碳
一氧化碳、
氧气和有机物存在下,至少还有一种带有羟基的化合物。羰基化是在不存在含卤素的
促进剂的情况下进行的。羰基化也是在含有中性双齿N-螯合
配体(N˜N)类型的
金属络合物催化剂存在下进行的,这种
配体是两个单负离子N,O-螯合
配体的一般类型(N˜O)
−
或四个双负离子螯合
配体(O˜N˜N˜O)
2−
。