Formal synthesis of (−)-Vallesamidine A 2,2,3-trialkylindoline alkaloid
摘要:
(S)-(+)-2-ethyl-2[2'-carboxymethyl]cyclopentanone 6 was prepared regio- and enantioselectively (ee = 90%) by ''deracemizing alkylation'' of the chiral imine 5 with methylacrylate. Compound 6 was transformed into the bicyclic imine (R)-(+)-3. This intermediate was used by Heathcock, in the racemic form, to the total synthesis of (+/-)-Vallesamidine 1, a 2,2,3-trialkylindoline alkaloid.
Formal synthesis of (−)-Vallesamidine A 2,2,3-trialkylindoline alkaloid
摘要:
(S)-(+)-2-ethyl-2[2'-carboxymethyl]cyclopentanone 6 was prepared regio- and enantioselectively (ee = 90%) by ''deracemizing alkylation'' of the chiral imine 5 with methylacrylate. Compound 6 was transformed into the bicyclic imine (R)-(+)-3. This intermediate was used by Heathcock, in the racemic form, to the total synthesis of (+/-)-Vallesamidine 1, a 2,2,3-trialkylindoline alkaloid.