The stereospecific preparation of D(+)-biotin is improved by a synthetic route involving the conversion of 3,4-isopropylidene-D-arabinose in which the OH group in the 2-position is not protected, into an ester of 6,9-dihydroxy-7,8-isopropylidenedioxynona-2,4-dienoic acid, the latter then being catalytically hydrogenated and subsequently converted into D(+)-biotin in a manner known per se.
通过一种合成路线改进了D(+)-
生物素的立体特异性制备,其中涉及将3,4-异丙基亚拉宾糖转化为6,9-二羟基-7,8-异丙基二氧杂环庚-2,4-二烯酸酯而不保护2-位的羟基,然后对后者进行催化氢化,随后以已知方法将其转化为D(+)-
生物素。