申请人:NISSHIN FLOUR MILLING CO., LTD.
公开号:EP0323913A2
公开(公告)日:1989-07-12
A new intermediate, an optically active (1R,5S,6S,7R)-6-tert-butyldiphenylsilyloxymethyl-7-hydroxybicyclo[3.3.0]octan-3-one (I) having high optical purity, is useful for the synthesis of an optically active carbacyclin and an optically active pentalenolactone E methyl ester. Compound (I) is also an intermediate compound useful in improving the optical purity of (1R,5S,6S,7R)-3,3-ethylenedioxy-6-hydroxymethyl-7-(2'-tetrahydropyranyloxy)bicyclo[3.3.0]octane. Compound (I) is prepared by reacting (1R,5S,6S,7R)-3,3-ethylenedioxy-6-hydroxymethyl-7-(2'-tetrahydropyranyloxy)bicyclo[3.3.0]octane with tert-butylchlorodiphenylsilane in the presence of a base and removing the ethylenedioxy and tetrahydropyranyl groups of the resultant compound under acid conditions.
一种具有高光学纯度的光学活性 (1R,5S,6S,7R)-6-叔丁基二苯基硅氧基甲基-7-羟基双环[3.3.0]辛烷-3-酮 (I) 的新中间体,可用于合成光学活性碳环素和光学活性五烯内酯 E 甲基酯。化合物 (I) 还是一种中间化合物,可用于提高 (1R,5S,6S,7R)-3,3-亚乙二氧基-6-羟甲基-7-(2'-四氢吡喃氧基)双环[3.3.0]辛烷的光学纯度。化合物 (I) 的制备方法是:在碱存在下,使 (1R,5S,6S,7R)-3,3-亚乙二氧基-6-羟甲基-7-(2'-四氢吡喃氧基)双环[3.3.0]辛烷与叔丁基二苯基氯硅烷反应,并在酸性条件下除去所得化合物中的亚乙二氧基和四氢吡喃基。