作者:Sylvie Bourrain、Graham A. Showell
DOI:10.1055/s-1994-25513
日期:——
A mild reduction method of C3-oximido-1,4-benzodiazepines to afford the C3-amino derivatives is described. The key step involves the formation of a carbamate oxime intermediate. The greater reactivity of the C3-(ethylaminocarbonyl)oximido-1,4-benzodiazepine towards hydrogenation, compared to the parent C3-oxime, enables the reduction to take place at ambient temperature using palladium-on-carbon. The mild conditions are more suitable for sensitive amines such as 3,5-diamino-1,4-benzodiazepines.
描述了一种温和的还原方法,将C3-氧肟基-1,4-苯二氮杂平还原为C3-氨基衍生物。关键步骤涉及形成一个碳酸酯氧肟中间体。与母体C3-氧肟相比,C3-(乙氨基羰基)氧肟基-1,4-苯二氮杂平对氢化具有更高的反应性,使得在常温下使用碳载钯进行还原成为可能。这种温和的条件更适合于像3,5-二氨基-1,4-苯二氮杂平这样的敏感胺。