Synthesis of (2R, 3R, 4R, 5R)-3,4-Dihydroxy-2,5-dihydroxymethylpyrrolidine and (-)-Anisomycin Derivative from (S)-Pyroglutamic Acid Derivative
作者:Nobuo Ikota
DOI:10.3987/com-94-7016
日期:——
Double asymmetric dihydroxylation of (E)-alpha,beta-unsaturated ester(2) with a catalytic amount of potassium osmate and chiral ligand gave dihydroxy compounds (3a and 4a) selectively. Polyhydroxylated pyrrolidines (10 and 14) were synthesized from corresponding methoxymethy ether (3c) and tert-butyl-dimethylsilyl ether(4d), respectively.
IKOTA, NOBUO, CHEM. AND PHARM. BULL., 37,(1989) N2, C. 3399-3402
作者:IKOTA, NOBUO
DOI:——
日期:——
Synthesis of (2R,3S,4S)-3,4-dihydroxy-2-hydroxymethylpyrrolidine and polyoxamic acid derivatives from (S)-pyroglutamic acid.
作者:Nobuo IKOTA
DOI:10.1248/cpb.37.3399
日期:——
(2R, 3S, 4S)-3, 4-Dihydroxy-2-hydroxymethylpyrrolidin (6) and polyoxamic acid (20) were synthesized from (S)-pyroglutamic acid derivatives (1 and 7). The key reactions are the selective mono-O-benzylation of 1 and 7, and subsequent Mitsunobu reaction to invert the stereochemistry of the free hydroxy group of 3 and 11.