Iodine-Promoted N-Acylation of Amines with Hydrazide: An Efficient Metal-Free Amidation
作者:Keyume Ablajan、Long Tian、Qianwei Zhang
DOI:10.1055/a-1838-9491
日期:2022.10
protocol for the amidation of hydrazide with amine has been developed by utilizing I2 as an oxidant under metal- and base-free conditions at room temperature. N-Acylation products of amines were obtained in good to excellent yields without using toxic reagents. This method is operationally straightforward and tolerates aliphatic/aromatic and primary/secondaryamines with different hydrazides.
通过在室温下在无金属和无碱条件下使用 I 2作为氧化剂,开发了一种用于酰肼与胺的酰胺化的有效方案。在不使用有毒试剂的情况下,以良好至极好的收率获得了胺的 N-酰化产物。该方法操作简单,可耐受脂肪族/芳香族和伯/仲胺与不同的酰肼。
Method for producing amides or polyamides by using aromatic carbamates by way of isocyanates as precursors through catalyzed thermal processes and method for producing aromatic carbamate precursors from aromatic amines
申请人:Great Eastern Resins Industrial Co., Ltd.
公开号:US10450265B2
公开(公告)日:2019-10-22
The present invention is directed to a process for preparing amides or polyamides by replacing isocyanate starting materials of a catalyzed thermal reaction with aromatic carbamates. Through the catalyzed thermal process involving a non-isocyanate precursor of the present invention, efficiency for producing amides or polyamides can be significantly improved, and the impure side products produced from a side reaction of isocyanate can be greatly curtailed. Hence, amides or polyamides of high purity and yield can be achieved. The invention also relates to a process for preparing aromatic carbamates, the new non-isocyanate precursors for amides or polyamides.