The Organocopper Route from (2-Propynylidene)morpholinium Triflates to Morpholinoallenes, 1-Morpholino-1,3-butadienes, and 2-Morpholino-1,3-butadienes
作者:Gerhard Maas、Theo Mayer
DOI:10.1055/s-1991-28421
日期:——
Organocopper reagents undergo conjugate addition to (1,3-diphenyl- and (1-methyl-3-phenyl-2-propynylidene)morpholinium triflates 1a and 1b. The resulting morpholinoallenes can be isolated if the allenic unit bears no CH substituent. Allenes bearing a R1R2 CH substituent at C-3 can be isolated in some cases; their thermal isomerization yields 4-(1,3-diphenyl-1,3-alkadienyl)morpholines 9. Allenes resulting from salt 1b spontaneously isomerize to 2-morpholino-1,3-butadienes 12. Reaction of allylcopper with 1a yields 4-[(3Z and 3E)-1, 3-diphenyl-1,3,5-hexatrienyl]morpholine (8).
有机铜试剂与(1,3-二苯基和(1-甲基-3-苯基-2-丙炔亚基)吗啉三氯酸盐 1a 和 1b 发生共轭加成反应。如果异链单元不带有 CH 取代基,则可以分离出所得的吗啉烯。在某些情况下,可以分离出在 C-3 上带有 R1R2 CH 取代基的烯;它们的热异构化反应可以生成 4-(1,3-二苯基-1,3-烷二烯基)吗啉 9。盐 1b 生成的烯丙基酚会自发异构为 2-吗啉基-1,3-丁二烯 12。 烯丙基铜与 1a 反应生成 4-[(3Z 和 3E)-1,3-二苯基-1,3,5-己三烯基]吗啉 (8)。