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    • 1. 发明授权
    • Processes for the synthesis of diprotected
R[R*,S*]-3,5-dihydroxy-6-oxohexanoate esters
    • 合成二保护R [R *,S *] - 3,5-二羟基-6-氧代己酸酯的方法
    • US4870199A
    • 1989-09-26
    • US166594
    • 1988-03-10
    • Kau-Ming ChenGoetz E. HardtmannPrasad K. KapaGeorge T. LeeJerome LinderSompong Wattanasin
    • Kau-Ming ChenGoetz E. HardtmannPrasad K. KapaGeorge T. LeeJerome LinderSompong Wattanasin
    • C07D209/18C07D233/54C07F7/18
    • C07D233/64C07D209/18C07F7/1852Y02P20/55
    • Process for the synthesis of compounds of the formula ##STR1## in R[R*,S*] enantiomeric form, wherein each P.sub.1 is independently an hydroxy group-protecting group, andR.sub.2z is C.sub.1-4 alkyl, benzyl or allyl,comprising, as a key step when R.sub.2z is R.sub.2x, the reaction of the compound of the formula ##STR2## in (S) enantiomeric form with a compound of the formulaMg.sup. .circle.+2 (.sup..crclbar. OOC--CH.sub.2 --COOR.sub.2x).sub.2to obtain a compound of the formula ##STR3## in (S) enantiomeric form, and, as a key step when R.sub.2z is R.sub.2y, the reaction of a compound of the formula ##STR4## in (S) enantioimeric form with a compound of the formulaLi.sup..sym..crclbar. CH.sub.2 --COOR.sub.2yto obtain a compound of the formula ##STR5## in (S) enantiomeric form, wherein R.sub.2x is primary or secondary C.sub.1-4 alkyl, benzyl or allyl,R.sub.2y is C.sub.1-4 alkyl not containing an asymmetric carbon atom, andR.sub.3 ' is methyl or ethyl,processes for the synthesis of compounds of the formula ##STR6## comprising reacting a compound of the formula ##STR7## with the reaction product of a strong base and a compound of the formula ##STR8## optionally followed by, when R.sub.2z is allyl, cleavage of the allyl and P.sub.1 groups to obtain the corresponding compound of the formula ##STR9## wherein each R.sub.7 is methyl or ethyl,R is as defined in the specification, and eachP.sub.1 independently and R.sub.2z are as defined above, andthe compounds of the formula ##STR10## wherein R and each R.sub.7 are as defined above.
    • 用于合成R [R *,S *]对映体形式的式“IMAGE”的化合物的方法,其中每个P1独立地是羟基保护基,R2z是C1-4烷基,苄基或烯丙基,包括作为 R2z为R2x时的关键步骤,式(S)对映异构形式的式(IMA)化合物与式Mg&cir&+2(( - )OOC-CH2-COOR2x)2的化合物的反应,得到化合物 式(S)对映体形式的式(IMAGE)式中,作为R2z为R2y的关键步骤,式(S)对映异构体形式的式“IMAGE”的化合物与式Li )( - )CH2-COOR2y,得到(S)对映异构体形式的下式的化合物,其中R2x是伯或仲C 1-4烷基,苄基或烯丙基,R2y是不含不对称碳原子的C 1-4烷基, 并且R 3'是甲基或乙基,用于合成式IMA化合物的方法包括使式IMA的化合物与强碱的反应产物 da化合物,其中当R 2z是烯丙基时,烯丙基和P1基团裂解,得到相应的式“IMAGE”化合物,其中每个R 7是甲基或乙基,R如说明书中所定义 ,每个P1独立地和R2z如上所定义,并且式“IMAGE”的化合物其中R和每个R 7如上所定义。