reduced with lithium aluminum hydride to the aminoalcohols 2 and 4; the latter were cyclized by means of arylimino ethers to methylene-bridged tetrahydro- (6a-c) and hexahydro-3,1-benzoxazines (7b-d), respectively. The endo (2) and exo (4) aminoalcohols were converted to methylene-bridged tetrahydro-3,1-benzoxazin-2-one (9) and hexahydro-3,1-benzoxazin-2-one (12) with ethyl chloroformate and sodium methoxide;
3-内
氨基双环[2.2.1]庚-5-烯-2-内
羧酸(1),由内
降冰片烯5-烯-2,3-二
羧酸酐和类似的饱和顺式-外
氨基酸(3)用
氢化铝锂还原成
氨基醇2和4 ; 后者通过芳胺基醚环化成亚甲基桥连的四氢-(6a-c)和六氢-3,1-苯并恶嗪(7b-d)。的内(2)和外(4)用
氯甲酸乙酯和
甲醇钠将
氨基醇转化为亚甲基桥连的四氢-3,1-苯并恶嗪-2-酮(9)和六氢-3,1-苯并恶嗪-2-酮(12);用
二硫化碳对醇进行处理,通过二
硫代
氨基甲酸酯得到相应的2-
硫酮(11、13)。结构通过红外光谱和核磁共振谱证实。