Optically pure amines were synthesized effectively by Lewis acid-catalyzed triethylsilane reduction of N-acyl-α-methoxyalkylamines which were readily obtained by anodic oxidation of N-acyl-α-amino acids. This method was also applied to the conversion of an N-acylpeptide into the corresponding optically pure amine derivative.
The decarboxylative reduction of naturally abundant carboxylicacids such as α-amino acids and α-hydroxy acids has been achieved via visible-lightphotoredoxcatalysis. By using an organocatalytic photoredox system, this method offers a mild and rapid entry to a variety of high-value compounds including medicinally relevant scaffolds. Regioselective decarboxylation is achieved when differently substituted
[EN] DERIVATIVES OF SOBETIROME<br/>[FR] DÉRIVÉS DE SOBÉTIROME
申请人:UNIV OREGON HEALTH & SCIENCE
公开号:WO2016134292A1
公开(公告)日:2016-08-25
Ester derivatives of sobetirome with enhanced CNS distribution are disclosed.
公开了具有增强的中枢神经系统分布的索贝曲罗甲酯衍生物。
Synthesen auf dem Vitamin-B12-Gebiet. 4. Mitteilung Partialsynthese von Vitamin B12
作者:W. Friedrich、G. Gross、K. Bernhauer、P. Zeller
DOI:10.1002/hlca.19600430314
日期:——
A partial synthesis of vitamin B12 is described, starting from factor V1a, a monocarboxylic acid. The necessary phosphoric acid diester containing the nucleotide and 1-amino-2-propanol is obtained from the 2′,3′-cyclic phosphate of 1-α-D-ribofuranosyl-5,6-dimethyl-benzimidazole. Condensation of factor V1a with the ‘side chain’ is effected via a mixed anhydride. Unnatural analogues of vitamin B12, one
The first synthesis of optically active 1-substituted taurines
作者:Jiaxi Xu、Shu Xu、Qihan Zhang
DOI:10.1002/hc.20133
日期:——
Opticallyactive 1-substituted taurines, a type of important sulfur analogues of naturally occurring amino acids, and their N-benzyloxycarbonyl-protected derivatives were synthesized from the corresponding opticallyactive β-amino secondary alcohols in three steps via N-protection with benzyl chloroformate, substitution with thiolacetic acid under Mitsunobu conditions, and oxidation with performic