Switching Regioselectivity in the Allylation of Imines by N-Side Chain Tuning
摘要:
A spectacular inversion of alpha- to gamma-regioselectivity in the allylzincation of imines can be achieved by fine-tuning of the N-side chain. This approach allows easy preparation of regioisomeric amines, in racemic as well as enantiopure forms. The usefulness of the method is illustrated by the parallel asymmetric syntheses of 2,3- and 2,5-diphenylpyrrolidines.
Switching Regioselectivity in the Allylation of Imines by N-Side Chain Tuning
摘要:
A spectacular inversion of alpha- to gamma-regioselectivity in the allylzincation of imines can be achieved by fine-tuning of the N-side chain. This approach allows easy preparation of regioisomeric amines, in racemic as well as enantiopure forms. The usefulness of the method is illustrated by the parallel asymmetric syntheses of 2,3- and 2,5-diphenylpyrrolidines.
Here we report an iridium-catalyzed asymmetric umpolung allylation of imines as a general approach to prepare 1,4-disubstituted homoallylic amines, a fundamental class of compounds that are hitherto not straightforward to obtain. This transformation proceeds by a cascade involving an intermolecular regioselective allylation of 2-azaallyl anions and a following 2-aza-Cope rearrangement, utilizes easily
Organocatalytic asymmetric synthesis of antidepressants
申请人:COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCH
公开号:US10266481B2
公开(公告)日:2019-04-23
The present invention relates to a short enantioselective synthesis of 1-amino aryl tetraline compounds of Formula 1 via nucleophilic enamine catalysis using organocatalyst such as proline.
wherein R1 and R2 represent independent of each other hydrogen, (un)substituted or substituted amine;
R3 and R4 represent independent of each other hydrogen or halogen.
ORGANOCATALYTIC ASYMMETRIC SYNTHESIS OF ANTIDEPRESSANTS
申请人:COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCH
公开号:US20170158607A1
公开(公告)日:2017-06-08
The present invention relates to a short enantioselective synthesis of 1-amino aryl tetraline compounds of Formula 1 via nucleophilic enamine catalysis using organocatalyst such as proline.
wherein R
1
and R
2
represent independent of each other hydrogen, (un)substituted or substituted amine;
R
3
and R
4
represent independent of each other hydrogen or halogen.