G
Gage James R
Researcher at Harvard University
Publications - 19
Citations - 879
Gage James R is an academic researcher from Harvard University. The author has contributed to research in topics: Enantioselective synthesis & Aldol reaction. The author has an hindex of 10, co-authored 19 publications receiving 863 citations. Previous affiliations of Gage James R include Upjohn.
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Journal ArticleDOI
13C NMR chemical shift correlations in 1,3-diol acetonides. Implications for the stereochemical assignment of propionate-derived polyols
TL;DR: Rychnovsky's recent correlation of the stereochemistry-dependent 13 C NMR chemical shifts of 4,6-disubstituted 1,3-diol acetonides with diol stereochemistry may be extended to more highly substituted dioxolanes bearing substituents in the 5-position as discussed by the authors.
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Total synthesis of (+)-calyculin A
TL;DR: A convergent asymmetric synthesis of the marine natural product calyculin A has been accomplished through the union of the two subunits comprising the C 1 -C 25 and C 26 -C 37 portions of the molecule as discussed by the authors.
Journal ArticleDOI
Asymmetric synthesis of calyculin A. 2. The C26-C37 .gamma.-amino acid fragments
TL;DR: New chiral imide enolate alkylation, aldol, and Michael addition bond constructions have been employed in the asymmetric synthesis of the C 26 -C 37 portion of calyculin A as mentioned in this paper.
Journal ArticleDOI
Asymmetric synthesis of calyculin A. 1. The C1-C25 spiroketal fragment
David A. Evans,Gage James R +1 more
Journal ArticleDOI
Reversal of aldehyde diastereofacial selectivity in a methyl ketone aldol reaction. Application to the synthesis of the calyculin spiroketal
David A. Evans,Gage James R +1 more
TL;DR: In this paper, it has been observed that aldehyde diastereofacial selectivity in a methyl ketone aldol reaction can be fully regulated under appropriate conditions.