Efficient Synthesis of Optically Active 4,5-Dihydroxy-2,3,4,5-tetrahydro-1H-1-benzazepine Derivatives Utilizing Lipase-Catalyzed Transesterification
作者:Tadaaki Ohtani、Kazuyoshi Kitano、Jun Matsubara、Yoshikazu Kawano、Makoto Komatsu、Minoru Uchida、Fujio Tabusa、Yoshimitsu Nagao
DOI:10.3987/com-06-s(o)42
日期:——
and enantioselective synthesis of the 4,5-dihydroxy-benzazepine compounds, the syntheses of optically active 5-0-protected trans-4,5-dihydroxybenzazepine derivatives were accomplished. The trans-7-chloro-4-hydroxy-5-methoxymethoxy-1 -(p-toluenesulfonyl)-2,3,4,5-tetrahydro-1H-1-benzazepine [(±)-4] was kinetically resolved by lipase-catalyzed transesterification. The optically active 4* was isomerized into
作为4,5-二羟基-苯并氮杂化合物的高效和对映选择性合成,完成了光学活性5-0-保护的反式-4,5-二羟基苯并氮杂衍生物的合成。trans-7-chloro-4-hydroxy-5-methoxymethoxy-1 -(p-甲苯磺酰基)-2,3,4,5-tetrahydro-1H-1-苯并氮杂[(±)-4]被脂肪酶动力学分解-催化的酯交换。利用Mitsunobu酯化随后水解将光学活性4*异构化为顺式化合物(6*)。手性化合物 (4* 和 6*) 转化为 4,5-双甲氧基甲氧基化合物 (7*-10*),它们是化合物 (2a, b 和 3a, b) 的中间体。