The present invention relates to a process for the preparation of a compound of formula (I), hydrates or solvates thereof; (I) said process comprising the steps of a) reacting a compound of formula (II), with an acylating or a silylating agent to produce a compound of formula (III), (II) (III) wherein P1 is a protecting group selected from R1CO-, or R2Si(R3)(R4)-, P2 is a protecting group selected from (R6R5R7)C-CO-, or (R2)Si(R3)(R4)-, wherein R1 is a group selected from C1-6alkyl or C3-6cycloalkyl, each group being optionally substituted by one or more substituents independently selected from fluoro or C1-4alkyl; R2, R3 and R4 are each independently a group selected from C1-6alkyl or phenyl, each group being optionally substituted by one or more substituents independently selected from fluoro or C1-4alkyl; R5 is a group selected from C1-6alkyl or phenyl, each group being optionally substituted by one or more substituents independently selected from fluoro or C1-4alkyl; R6 and R7 are each independently hydrogen or a group selected from C1-6alkyl or phenyl, each group being optionally substituted by one or more substituents independently selected from fluoro or C1-4alkyl; b) reacting the compound of formula (III) in the presence of at least one oxidizing agent selected from permanganate salt, osmium oxide, hydrogen peroxide, or iodine and silver acetate to produce compound of formula (IV); and (IV)5 c) deprotecting the compound of formula (IV) to produce compound of formula (I).
本发明涉及一种用于制备化合物的过程,其
化学式为(I),以及其
水合物或溶剂合物;(I)所述过程包括以下步骤:a)将化合物的
化学式为(II)与酰化剂或
硅烷化剂反应,生成化合物的
化学式为(III),其中P1是从R1CO-或R2Si(R3)(R4)-中选择的保护基,P2是从(R6R5R7)C-CO-或(R2)Si(R3)(R4)-中选择的保护基,其中R1是从C1-6烷基或C3-6环烷基中选择的基团,每个基团可以选择一个或多个独立选择的
氟或C1-4烷基取代基;R2、R3和R4分别独立选择自C1-6烷基或苯基,每个基团可以选择一个或多个独立选择的
氟或C1-4烷基取代基;R5是从C1-6烷基或苯基中选择的基团,每个基团可以选择一个或多个独立选择的
氟或C1-4烷基取代基;R6和R7分别独立选择氢或从C1-6烷基或苯基中选择的基团,每个基团可以选择一个或多个独立选择的
氟或C1-4烷基取代基;b)在存在至少一种氧化剂的情况下,将
化学式为(III)的化合物与
高锰酸盐、
氧化铼、
过氧化氢或
碘和
乙酸银反应,生成
化学式为(IV)的化合物;以及c)去保护
化学式为(IV)的化合物,生成
化学式为(I)的化合物。