Synthesis 2022; 54(04): 1055-1080
DOI: 10.1055/a-1517-7515
special topic
Cycloadditions – Established and Novel Trends – in Celebration of the 70th Anniversary of the Nobel Prize Awarded to Otto Diels and Kurt Alder

Asymmetric Synthesis of Fused Tetrahydroquinolines via Intra­molecular Aza-Diels–Alder Reaction of ortho-Quinone Methide Imines

Fabian Hofmann
,
Cornelius Gärtner
,
Martin Kretzschmar
,
Generous financial support has been provided by the Deutsche Forschungsgemeinschaft (SCHN 441/11-2) and the Deutsche Bundesstiftung Umwelt (DBU) in the form of a predoctoral fellowship awarded to M.K.


Abstract

Aza-Diels–Alder reactions are straightforward processes for the construction of N-heterocycles, featuring inherent atom-economy and stereospecificity. Intramolecular strategies allow the formation of bicyclic core structures with up to three stereocenters within a single step. Herein, this concept is combined with the chemistry of chiral Brønsted acid bound ortho-quinone methide imines to generate a range of interesting fused tetrahydroquinolines in a diastereo- and enantioselective­ manner.

Supporting Information



Publication History

Received: 23 April 2021

Accepted after revision: 26 May 2021

Accepted Manuscript online:
26 May 2021

Article published online:
01 July 2021

© 2021. Thieme. All rights reserved

Georg Thieme Verlag KG
Rüdigerstraße 14, 70469 Stuttgart, Germany