Synthesis of methyl derivatives of uronic acids II. Synthesis of the 2,3-, 2,4-, and 2,4-di- and 2,3,4-tri-O-methyl ethers of methyl (methylα-D-galactopyranosid) uronate
作者:V. I. Grishkovets、A. E. Zemlyakov、V. Ya. Chirva
DOI:10.1007/bf00580446
日期:1982.5
Unidirectional methods are proposed for the synthesis of the 2,3-, 2,4-, and 3,4-di-, and 2,3,4-tri-O-methyl ethers of methyl (methyl α-D-galactopyranosid) uronate by the oxidation (CrO3-H2SO4-acetone) of the corresponding methyl O-benzyl-O-methyl-α-D-galactopyranosides having unsubstituted 6-OH groups to the corresponding (methyl O-benzyl-O-methyl-α-D-galactosid) uronic acids followed by esterification with CH2N2
提出了用于合成 2,3-、2,4- 和 3,4-二-和 2,3,4-三-O-甲基醚(甲基 α-D-吡喃半乳糖苷)的单向方法通过将具有未取代 6-OH 基团的相应甲基 O-苄基-O-甲基-α-D-吡喃半乳糖苷氧化(CrO3-H2SO4-丙酮)生成相应的(甲基 O-苄基-O-甲基-α-D -半乳糖苷)糖醛酸,然后用 CH2N2 酯化和苄基的催化氢解。