Synthesis of 6-amino-1-benzyl-4-methylhexahydro-1<i>H</i>-1,4-diazepine
作者:Shiro Kato、Hiroshi Harada、Toshiya Morie
DOI:10.1002/jhet.5570320244
日期:1995.3
respectively (methods A—C). These compounds were transformed into the desired 3b, The preparation of 1,4-diazepine ring frommethyl 2-tert-butoxycarbonyl-aminopropenate (18) was alternatively achieved by the intramolecular amidation of the intermediate 19a (method D) or reductivecyclization of the aminoaldehyde 23a (method E). Method E was found to efficiently produce the 6-amino-1,4-diazepine 3b.
描述了使用N-苄基-N'-甲基乙二胺(8a)合成6-氨基-1-苄基-4-甲基六氢-1 H -1,4-二氮杂(3b)的合成途径的五种变体(方法A-E)。的反应8A与1-苯磺酰基-2- bromomethylaziridine (7),2-苯基-4-(p -toluenesulfonyloxymethyl)恶唑啉(13) ,和β,β-dibromoisobutyric酸(15)导致的直接环化,得到前体3b中,6-取代的1,4-二氮杂衍生物9,14,和16,分别(方法A–C)。将这些化合物转化为所需的3b。另一种方法是,通过中间体19a的分子内酰胺化(方法D)或化合物的还原环化,由2-叔丁氧基羰基氨基丙酸甲酯(18)制备1,4-二氮杂环。氨基醛23a(方法E)。发现方法E有效地生产了6-氨基-1,4-二氮杂卓3b。