SYNTHESIS OF 6-AMINO-6-DEOXY-2,3,4,5- TETRA-O-METHYL-D-GALACTONIC ACID, A KEY PRECURSOR OF A STEREOREGULAR POLYAMIDE1
作者:Carmen Zaliz、Oscar Varela
DOI:10.1081/car-100108283
日期:——
α-pyranoside (6). Methylation of the free hydroxyl groups of 5 and 6 gave the respective per-O-methyl derivatives 7 and 8. In order to maintain the size of the sugar ring during the sequence, compound 8 was alternatively prepared from 9, by acetylation, substitution by azide and per-O-methylation. Hydrolysis of the glycoside followed by oxidation and further 5-O-methylation afforded the 6-azido-6-deoxy carboxylic