racemic dihydroazulene (1) is resolved on triacetyl cellulose into its pure enantiomers; treatment of (1) with N-methyltriazolinedione and with singlet oxygen leads to the polycyclic compounds (2) and (3), respectively; (3) is converted to the dione (5), via(4), and to the diepoxide (6); all reactions are highly diastereoselective.
外消旋二氢氮杂烯(1)在三
乙酰基纤维素上分解为纯对映异构体;(1)用N-
甲基三唑啉二酮和单线态氧处理分别得到
多环化合物(2)和(3);(3)转化为二酮(5),通过(4),和所述二
环氧化物(6); 所有反应都是高度非对映选择性的。