Synthesis 2023; 55(22): 3793-3798
DOI: 10.1055/a-2122-1573
paper

A Photoinduced Palladium-Catalyzed Cascade Reaction for the Synthesis of Chiral Piperidines with Chiral Amino Acid Derivatives and 1,3-Dienes

Shun Song
,
Yi-Zhuo Yin
,
Zhi-Yong Han
We are grateful for financial support from NSFC (21971231).


Abstract

A photoinduced palladium-catalyzed cascade reaction involving remote C(sp3)–H functionalization and intramolecular Tsuji–Trost annulation is developed. The reaction is proposed to proceed through a sequence involving the amidyl radical generation, 1,5-HAT-mediated alkyl radical formation, and subsequent difunctionalization of 1,3-dienes. Without the use of exogeneous photosensitizers and external oxidants, the reaction provided an efficient approach to multi-substituted chiral piperidines in high yields, employing readily available chiral amino acid derivatives and 1,3-dienes as the substrates. In most cases, the syn/anti ratio of the product could be further improved by treatment with catalytic amount of iron salt.

Supporting Information



Publication History

Received: 13 May 2023

Accepted after revision: 03 July 2023

Accepted Manuscript online:
03 July 2023

Article published online:
14 August 2023

© 2023. Thieme. All rights reserved

Georg Thieme Verlag KG
Rüdigerstraße 14, 70469 Stuttgart, Germany