作者:Darshan Ranganathan、Ramesh Rathi、Krishnan Keshavan、Waheguru Pal Singh
DOI:10.1016/s0040-4020(01)82069-x
日期:1986.1
6-Allyloxy-9-benzylpurine (2) and 9-benzyl-6-propargyloxy purine (5) undergo normal thermal O→N [3,3] rearrangement, either neat or in o-dichlorobenzene. The latter leads to the novel, 1-allenyl-9-benzyl-hypoxanthine (6). The related 4-allyloxy and 4-propargyloxy quinazoline; (9, 12) also undergo smooth thermal O→N Claisen rearrangement. In the case of(12), the primary allenic product is further transformed into
6-烯丙氧基-9-苄基嘌呤(2)和9-苄基-6-炔丙氧基嘌呤(5)在纯净或在邻二氯苯中进行正常的O→N [3,3]热重排。后者导致了新的1-烯基-9-苄基次黄嘌呤(6)。相关的4-烯丙氧基和4-炔丙氧基喹唑啉;(9,12)也经历了顺畅的O→N Claisen热重排。在(12)的情况下,初级艾伦产物进一步转化为3-炔丙基喹唑啉-4-酮(13)和丙二烯二聚体(14)。