| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: invention relates to a method for regiospecific synthesis of rapamycin 42-ester derivatives of formula , where R is ketal isopropylidene substituted with 3-hydroxy-2-(hydroxymethyl)-2-methylpropionic acid, linear or branched C1-C10 alkyl, which possibly contains a halogen, C2-C8 alkenyl, or phenyl, where the said method involves acylation of 42-hydroxyrapamycin with an acyl donor in the presence of lipase. The invention also relates to regiospecific preparation of rapamycin 42-ester from ketal isopropylidene substituted with 3-hydroxy-2-(hydroxymethyl)-2-methylpropionic acid in the presence of lipase. ^ EFFECT: increased output of the product under mild conditions. ^ 13 cl, 12 ex |
