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    • 10. 发明授权
    • Process for preparing 1,3-dioxolane derivatives
    • 1,3-二氧戊环衍生物的制备方法
    • US5208331A
    • 1993-05-04
    • US900568
    • 1992-06-18
    • Norman H. DysonJohn O. GardnerAnthony PrinceDenis J. Kertesz
    • Norman H. DysonJohn O. GardnerAnthony PrinceDenis J. Kertesz
    • C07D233/60C07D405/06C07D521/00
    • C07D249/08C07D231/12C07D233/56
    • This invention provides an improved process for the preparation of compounds of formula (I): ##STR1## wherein: n is 0, 1 or 2;each R.sup.1 is independently halo or lower alkyl;R.sup.2 is nitro or --N(R.sup.3)R.sup.4 whereR.sup.3 is hydrogen or lower alkyl;R.sup.4 is hydrogen, lower alkyl, lower alkylsulfonyl or --C(Y)R.sup.5 where Y is oxygen or sulfur and R.sup.5 is hydrogen, lower alkyl, lower alkoxy or --N(R.sup.6)R.sup.7 where R.sup.6 is hydrogen or lower alkyl and R.sup.7 is hydrogen, lower alkyl or lower alkoxycarbonyl; orR.sup.3 and R.sup.4 together with N is pyrrolidino, piperidino, morpholino, thiomorpholino or piperazino, wherein the piperazino is optionally substituted at the 4-position by --C(O)R.sup.8 where R.sup.8 is hydrogen, lower alkyl, lower alkoxy or amino;or pharmaceutically acceptable salts thereof. These compounds are useful in treating disease-states characterized by hypercholesterolemia.
    • 本发明提供了制备式(I)化合物的改进方法:其中:n为0,1或2; 每个R 1独立地为卤素或低级烷基; R2是硝基或-N(R3)R4,其中R3是氢或低级烷基; R4是氢,低级烷基,低级烷基磺酰基或-C(Y)R5,其中Y是氧或硫,R5是氢,低级烷基,低级烷氧基或-N(R6)R7,其中R6是氢或低级烷基,R7是氢 ,低级烷基或低级烷氧基羰基; 或R 3和R 4与N一起为吡咯烷子基,哌啶子基,吗啉代,硫代吗啉代或哌嗪子基,其中哌嗪基在4-位被-C(O)R 8任选取代,其中R 8是氢,低级烷基,低级烷氧基或氨基; 或其药学上可接受的盐。 这些化合物可用于治疗以高胆固醇血症为特征的疾病状态。