| 摘要 |
The invention relates to preparation of ticagrelor of formula I and comprises a reaction of a compound of formula IV with a deprotection agent in a solvent to a compound of formula V, which is advantageously isolated by crystallization and subsequently used for the preparation of ticagrelor. The substituent R in formulae IV and V is CH2CH2OH, CH2COOH, or CH2COOR1; R1 is a branched or unbranched R1-C4 alkyl; and X is NH2, NO2f or NHCHO. |
