Asymmetric syntheses of 3-amino-2-methylpentanoic acids. Configurations of the β-amino acid in majusculamide C, 57-normajusculamide C and dolastatins 11 and 12
摘要:
The first synthesis of 3-amino-2-methylpentanoic acids is reported. Comparison of the synthetic 2R,3R and 2L,3S acids with 3-amino-2-methylpentanoic acid obtained by degradation of the antifungal depsipeptide majusculamide C indicates that majusculamide C, 57-normajusculamide C, and the antitumor agents dolastatins 11 and 12 have the 2S,3R configurations at the chiral centers in their beta-amino acid component.
Asymmetric syntheses of 3-amino-2-methylpentanoic acids. Configurations of the β-amino acid in majusculamide C, 57-normajusculamide C and dolastatins 11 and 12
摘要:
The first synthesis of 3-amino-2-methylpentanoic acids is reported. Comparison of the synthetic 2R,3R and 2L,3S acids with 3-amino-2-methylpentanoic acid obtained by degradation of the antifungal depsipeptide majusculamide C indicates that majusculamide C, 57-normajusculamide C, and the antitumor agents dolastatins 11 and 12 have the 2S,3R configurations at the chiral centers in their beta-amino acid component.
Asymmetric syntheses of 3-amino-2-methylpentanoic acids. Configurations of the β-amino acid in majusculamide C, 57-normajusculamide C and dolastatins 11 and 12
作者:Robert B. Bates、Sanjeev Gangwar
DOI:10.1016/s0957-4166(00)86016-4
日期:1993.1
The first synthesis of 3-amino-2-methylpentanoic acids is reported. Comparison of the synthetic 2R,3R and 2L,3S acids with 3-amino-2-methylpentanoic acid obtained by degradation of the antifungal depsipeptide majusculamide C indicates that majusculamide C, 57-normajusculamide C, and the antitumor agents dolastatins 11 and 12 have the 2S,3R configurations at the chiral centers in their beta-amino acid component.