Enantioselective synthesis of tetrahydroisoquinolines and benzazepines by silane terminated Heck reactions with the chiral ligands (+)-TMBTP and (R)-BITIANP
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.