Synthesis of pyridine and 2,2′-bipyridine derivatives from the aza Diels–Alder reaction of substituted 1,2,4-triazines
作者:Stephen P. Stanforth、Brian Tarbit、Michael D. Watson
DOI:10.1016/j.tet.2004.07.024
日期:2004.9
derivatives 6b–d respectively (59–72%) and in the presence of 2,3-dihydrofuran 7 yielding the lactones 10b–d (39–44%). The 2,2′-bipyridine derivatives 6e–g were similarly obtained in good yield (81–87%) from the reaction of amidrazone 1b and tricarbonyl derivatives 2b–d in the presence of 2,5-norbornadiene 5.
在2,5-降冰片二烯5存在下,咪唑酮1a和三羰基衍生物2b – d在沸腾的乙醇中反应,分别得到吡啶衍生物6b – d(59–72%)和在2,3-二氢呋喃7存在下,生成吡啶衍生物6b – d。内酯10b – d(39–44%)。类似地,在2,5-降冰片二烯5存在下,胺1b与三羰基衍生物2b - d的反应也可以以高收率(81-87%)获得2,2'-联吡啶衍生物6e - g。