PubAg

Main content area

Stereochemical Characterization of Polyketide Stereotriads Synthesized via Hydrogen-Mediated Asymmetric syn-Crotylation

Author:
Pantin, Mathilde, Hubert, Jonathan G., Söhnel, Tilo, Brimble, Margaret A., Furkert, Daniel P.
Source:
Journal of organic chemistry 2017 v.82 no.20 pp. 11225-11229
ISSN:
1520-6904
Subject:
aldehydes, catalysts, chemical reactions, chemical structure, crystallography, diastereoselectivity, high performance liquid chromatography, hydrogen, organic chemistry, polyketides, stereochemistry
Abstract:
The stereoselective access to stereotriads as important polyketide building blocks is reported on the basis of the Krische-type hydrogen-mediated syn-crotylation. The products were obtained with an extremely high diastereoselectivity (dr >99:1), and the newly formed syn stereocenters were controlled solely by the chiral catalyst. The stereochemistry was assigned by crystallography and HPLC for both product manifolds. This extension of the burgeoning transfer hydrogen methodology gives divergent asymmetric access to anti,syn and syn,syn polyketide stereotriads from the same α-chiral starting material and avoids potentially epimerizable aldehyde intermediates.
Agid:
5836138