A short, practical synthesis of the ant venom alkaloid, three (3R,5S,8aS)-3-alkyl-5-methylindolizidines
作者:Hiroki Takahata、Hiroshi Bandoh、Takefumi Momose
DOI:10.1016/s0040-4020(01)81807-x
日期:1993.1
has been developed. The stereoselective intramolecular amidomercuration of the N-alkenylurethane 4 followed by oxidative demercuration provides the piperidine alcohol cis-6 as a major product. Thereafter, oxidation of cis-6 followed by the Horner-Emmons elongation of the ring appendages affords the enones 8, 10, and 11, which are stereoselectively converted into 1, 2, and 3, respectively, by catalytic
已经开发出一种简短,实用且非对映选择性的方法来制备蚂蚁生物碱,三个(3 R,5 S,8a S)-3-烷基-5-甲基吲哚并咪唑类(1-3)。所述的立体选择性分子内amidomercuration Ñ -alkenylurethane 4,接着通过氧化脱汞提供了哌啶醇的顺式- 6作为主要产物。此后,氧化顺式- 6,接着通过环的霍纳-埃蒙斯伸长附属物,得到烯酮8,10,和11,其被立体选择性地转化为1,2,和3,分别由催化氢化。