Enantioselective synthesis of tetrahydroisoquinolines and benzazepines by silane terminated Heck reactions with the chiral ligands (+)-TMBTP and (R)-BITIANP
作者:Lutz F. Tietze、Kai Thede、Ralph Schimpf、Franco Sannicolò
DOI:10.1039/a909689b
日期:——
The intramolecular Heck reaction of the iodoaryl compound 1
with a (Z)-allyl silane moiety in the presence of the chiral
ligand (+)-TMBTP 13 leads to the benzazepine 5b with 92% ee, whereas 3 with
an (E)-allyl silane moiety in the presence of the chiral ligand
(R)-BITIANP 14 gives 5a with 91% ee; in a similar way, 9 and 10
were transformed in the presence of 13 into the tetrahydroisoquinolines 11b
and 12b with 86 and 84% ee, respectively.
碘芳基化合物 1 与(Z)-烯丙基硅烷分子在手性配体(+)-TMBTP 13 的存在下发生分子内 Heck 反应,生成苯并氮杂卓 5b,ee 值为 92%;而 3 与(E)-烯丙基硅烷分子在手性配体(R)-BITIANP 14 的存在下发生分子内 Heck 反应,生成 5a,ee 值为 91%;同样,9 和 10 在 13 的存在下转化为四氢异喹啉 11b 和 12b,ee 值分别为 86% 和 84%。