Synlett 2019; 30(20): 2253-2257
DOI: 10.1055/s-0039-1690267
letter
© Georg Thieme Verlag Stuttgart · New York

Construction of the ACDE Ring System of Calyciphylline A-type Alkaloids via Intramolecular Diels–Alder Reaction of a Tetrasubstituted Olefin

Authors


This work was supported by a Grant-in-Aid for Scientific Research (S) (JSPS KAKENHI no. 16H06384, Y.T.), a Grant-in-Aid for JSPS fellows (H.N.) and the JSPS KAKENHI (Grant No. JP17H05051, C.T.), and JSPS KAKENHI (Grant No. JP18H04407, C.T.) in the Middle Molecular Strategy.
Weitere Informationen

Publikationsverlauf

Received: 18. September 2019

Accepted after revision: 29. Oktober 2019

Publikationsdatum:
07. November 2019 (online)


Graphical Abstract

Preview

Abstract

A concise synthesis of the ACDE tetracyclic ring system of calyciphylline A-type alkaloids was investigated. The intramolecular Diels–Alder reaction of a tetrasubstituted olefin with furan enabled the construction of the ACD ring system bearing two contiguous quaternary carbons in one step, and subsequent intramolecular [3+2] cycloaddition successfully gave the E ring.

Supporting Information