The total synthesis of a potent immunosuppressant (-)-FR901483 is accomplished. The skeleton itself is constructed by the Ugi 4CC reaction, subsequent intramolecular Dieckmann condensation, and a diastereoselective intramolecular aldol reaction. However, the remarkable feature is the stereoselective incorporation of the p-methoxybenzyl and methylamino groups within the tricyclic core skeleton.
The total synthesis of a potent immunosuppressant (-)-FR901483 is accomplished. The skeleton itself is constructed by the Ugi 4CC reaction, subsequent intramolecular Dieckmann condensation, and a diastereoselective intramolecular aldol reaction. However, the remarkable feature is the stereoselective incorporation of the p-methoxybenzyl and methylamino groups within the tricyclic core skeleton.
Rapid Syntheses of (−)‐FR901483 and (+)‐TAN1251C Enabled by Complexity‐Generating Photocatalytic Olefin Hydroaminoalkylation
作者:Dominik Reich、Aaron Trowbridge、Matthew J. Gaunt
DOI:10.1002/anie.201912010
日期:2020.2.3
We report a common strategy to facilitate the syntheses of the polycyclic alkaloids (-)-FR901483 (1) and (+)-TAN1251C (2). A divergent synthetic strategy provides access to both natural products through a pivotal spirolactam intermediate (3), which can be accessed on a gram-scale. A photocatalytic olefin hydroaminoalkylation brings together three readily available building blocks and forges the majority
The first synthesis of the immunosuppressant (−)-FR901483 (1) has been accomplished in 2% overall yield from O-methyltyrosine methyl ester (31) in 22 steps establishing the absolute stereochemistry of the natural product. A 1,3-dipolar cycloaddition of nitrone 5b with ethyl acrylate gave predominantly isoxazolidine 4b that was hydrogenated to give azaspirolactam 3b with the correct absolute and relative
Total Synthesis of Tricyclic Azaspirane Derivatives of Tyrosine: FR901483 and TAN1251C
作者:Malika Ousmer、Norbert A. Braun、Claude Bavoux、Monique Perrin、Marco A. Ciufolini
DOI:10.1021/ja016030z
日期:2001.8.1
A solution to the long-standing problem presented by the oxidative cyclization of a phenolic 3-arylpropionamide to a spirolactam has been developed in this laboratory via oxazoline chemistry. This research was motivated by our interest in some novel tricyclic azaspirane natural products formally derived from tyrosine, such as FR901483 and TAN1251C. In this paper, we disclose full details of the total synthesis of these substances.
An Enantiospecific Synthesis of the Potent Immunosuppressant FR901483
作者:Goetz Scheffler、Hirofumi Seike、Erik J. Sorensen
The architecturally sophisticated skeleton of the immunosuppressive alkaloid FR901483 was assembled via a process relying on the reaction of an in situ generated imine with a suitably disposed donor-acceptor cyclopropane. A short sequence of functional group transformations provided the natural product in an efficient manner.