HYDROGENOLYSIS OF CARBOHYDRATES: VII. METHYL β-<scp>L</scp>-ARABOPYRANOSIDE-1-C<sup>14</sup>
作者:Thomas Francis、A. S. Perlin
DOI:10.1139/v59-181
日期:1959.8.1
Methyl β-L-arabopyranoside-1-C14 was hydrogenolyzed in the presence of copper chrome oxide catalyst at 250 °C, yielding an approximately equimolar mixture of optically inactive cis- and trans-3,4-dihydroxytetrahydropyran-C14, together with 2,3-dihydroxypentane-C14. The latter was formed by reductive ring-opening of the tetrahydropyrandiols. Ether cleavage of each of the cyclic diols afforded 1,2,3
甲基 β-L-arabopyranoside-1-C14 在氧化铬铜催化剂存在下于 250°C 氢解,产生光学惰性的顺式和反式 3,4-二羟基四氢吡喃-C14 以及 2 的近似等摩尔混合物, 3-二羟基戊烷-C14。后者是通过四氢吡喃二醇的还原开环形成的。每个环状二醇的醚裂解得到 1,2,3,5-四羟基戊烷-C14,其中示踪剂在碳 1 和 5 之间分布大致相等。戊二醇中的碳 14 以类似方式分布。结果表明,原始戊糖苷的2-和4-羟基都容易发生还原裂解,环状二醇中的顺式和反式二醇基团是通过异构化形成的。他们认为甲氧基的氢解最初发生,