First synthesis of enantiomerically pure N-protected β-amino-α-keto esters from α-amino acids and dipeptides
摘要:
A racemization-free route from N-protected alpha-amino acids and dipeptides to N-protected beta-amino-alpha-keto esters is described, involving the sequence: diazoketone formation. Wolff rearrangement in methanol, diazo transfer, and oxidation with dimethyldioxirane.
Total Synthesis of the Originally Proposed and Revised Structures of Scleritodermin A
作者:Sheng Liu、Yong-Mei Cui、Fa-Jun Nan
DOI:10.1021/ol801419m
日期:2008.9.1
The first totalsynthesis of the originally proposed and revisedstructure of scleritodermin A, along with an isomer, were achieved by the use of an alpha-azido carboxyl group serving as the key alpha-ketoamide precursor, thus leading to a revision of the structure originally proposed for natural scleritodermin A.
A racemization-free route from N-protected alpha-amino acids and dipeptides to N-protected beta-amino-alpha-keto esters is described, involving the sequence: diazoketone formation. Wolff rearrangement in methanol, diazo transfer, and oxidation with dimethyldioxirane.