Novel Synthesis of Mafenide and Other Amino Sulfonamides by Electrochemical Reduction of Cyano Sulfonamides
作者:Shaik Lateef、Srinivasulu Reddy Krishna Mohan、Rudraraju Rameshraju、Srinivasulu Reddy Jayarama Reddy
DOI:10.1002/hlca.200690123
日期:2006.6
Both aliphatic and aromatic amino sulfonamides such as mafenide (1a) were synthesized in good yields (80–86%) by direct electrochemical hydrogenation of the corresponding nitriles in an undivided cell containing a Ni cathode, a Pt anode, and Raney Ni as catalyst (Table 1). The reaction can be performed without external supply of pressurized gas by in situ generation of H2. Slightly elevated temperatures
脂肪族和芳香族氨基磺酰胺类化合物(如马芬尼(1a))是通过在含Ni阴极,Pt阳极和阮内Ni作为催化剂的未分隔电池中将相应的腈直接电化学加氢而以高收率(80-86%)合成的(表1)。该反应可以在不通过原位产生H 2的外部供应加压气体的情况下进行。略微升高温度(45°)和低电流密度(10 mA / cm 2)是这种类型的电化学腈加氢的有利条件。我们的合成规程不需要高压设备或化学危害,在环境方面非常友好,比传统方法更经济。吸附的H的浓度。通过调节电势可以轻松控制催化剂表面的自由基,这可以提高产品的选择性,同时降低爆炸和着火的风险。