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    • 4. 发明授权
    • Synthesis of 11-deoxyprostaglandins
    • 11-脱氧前列腺素的合成
    • US4532081A
    • 1985-07-30
    • US548130
    • 1983-11-02
    • William L. WhitePeter B. Anzeveno
    • William L. WhitePeter B. Anzeveno
    • C07C255/45C07C121/48
    • C07C255/45
    • Improved procedures and intermediates for synthesizing 11-deoxyprostaglandins wherein trans-2,3-dicarbomethoxycyclopentanone is subjected to a novel alcoholysis with .beta.,.beta.,.beta.-trichloroethanol to substitute a .beta.,.beta.,62 -trichlorocarboethoxy group at the 2-position followed by alkylation to allow for a wide range of upper side chains to be introduced at the 2-position of the cyclopentanone ring. The unwanted .beta.,.beta.,.beta.-trichlorocarboethoxy group at the 2-position can then be removed easily by a zinc induced elimination-decarboxylation sequence. Base catalyzed epimerization of the 2-position side chain to the desired trans-configuration, relative to the carbomethoxy group in the 3-position, is followed by partial reduction of the 2-hexynyl moiety of the side chain to the desired cis-olefinic group of the E.sub.2 -type 11-dioxyprostaglandins, or through total reduction to the alkane upper side chain of E.sub.1 -type-prostaglandin analogs. Modification thereafter of the carbonyl group at the 3-position of the cyclopentanone ring by a variety of reagents allows introduction of the lower side chain present in the prostaglandins themselves or a variety of other side chains derived from the 3-carboxy-, 3-hydroxymethyl- or 3-aldehyde-substituted cyclopentanone ring. From the latter, 11-deoxyprostaglandins can be prepared by known procedures.
    • 用于合成11-脱氧前列腺素的改进方法和中间体,其中反式-2,3-二甲氧基环戊酮用β,β,β-三氯乙醇进行新的醇解,以取代2位的β,β,62-三氯甲氧基,接着进行烷基化 以允许在环戊酮环的2位引入宽范围的上侧链。 然后可以通过锌诱导的消除 - 脱羧化顺序容易地除去2-位上不需要的β,β,β-三氯甲氧基。 相对于3-位中的甲酯基,2-位侧链的碱催化差向异构化到所需的反式构型之后,将侧链的2-己炔基部分部分还原成所需的顺式 - 烯烃基团 的E2型11-二氧基前列腺素,或通过总体还原为E1型前列腺素类似物的烷烃上侧链。 此后,通过多种试剂在环戊酮环的3-位上的羰基进行改性,可以引入存在于前列腺素本身中的下侧链或衍生自3-羧基,3-羟甲基的各种其它侧链 - 或3-醛取代的环戊酮环。 从后者可以通过已知的方法制备11-脱氧前列腺素。
    • 9. 发明授权
    • Synthesis of 11-deoxyprostaglandins
    • 11-脱氧前列腺素的合成
    • US4447636A
    • 1984-05-08
    • US376984
    • 1982-05-10
    • William L. WhitePeter B. Anzeveno
    • William L. WhitePeter B. Anzeveno
    • C07C255/45C07C69/74C07C121/48
    • C07C255/45
    • Improved procedures and intermediates for synthesizing 11-deoxyprostaglandins wherein trans-2,3-dicarbomethoxycyclopentanone is subjected to a novel alcoholysis with .beta.,.beta.,.beta.-trichloroethanol to substitute a .beta.,.beta.,.beta.-trichlorocarboethoxy group at the 2-position followed by alkylation to allow for a wide range of upper side chains to be introduced at the 2-position of the cyclopentanone ring. The unwanted .beta.,.beta.,.beta.-trichlorocarboethoxy group at the 2-position can then be removed easily by a zinc induced elimination-decarboxylation sequence. Base catalyzed epimerization of the 2-position side chain to the desired trans-configuration, relative to the carbomethoxy group in the 3-position, is followed by partial reduction of the 2-hexynyl moiety of the side chain to the desired cis-olefinic group of the E.sub.2 -type 11-deoxyprostaglandins, or through total reduction to the alkane upper side chain of E.sub.1 -type prostaglandin analogs. Modification thereafter of the carbonyl group at the 3-position of the cyclopentanone ring by a variety of reagents allows introduction of the lower side chain present in the prostaglandins themselves or a variety of other side chains derived from the 3-carboxy-, 3-hydroxymethyl- or 3-aldehyde-substituted cyclopentanone ring. From the latter, 11-deoxyprostaglandins can be prepared by known procedures.
    • 用于合成11-脱氧前列腺素的改进方法和中间体,其中反式-2,3-二甲氧基环戊酮用β,β,β-三氯乙醇进行新的醇解,以在2位置替代β,β,β-三氯甲氧基,接着进行烷基化 以允许在环戊酮环的2位引入宽范围的上侧链。 然后可以通过锌诱导的消除 - 脱羧化顺序容易地除去2-位上不需要的β,β,β-三氯甲氧基。 相对于3-位中的甲酯基,2-位侧链的碱催化差向异构化到所需的反式构型之后,将侧链的2-己炔基部分部分还原成所需的顺式 - 烯烃基团 的E2型11-脱氧前列腺素,或通过总体还原为E1型前列腺素类似物的烷烃上侧链。 此后,通过多种试剂在环戊酮环的3-位上的羰基进行改性,可以引入存在于前列腺素本身中的下侧链或衍生自3-羧基,3-羟甲基的各种其它侧链 - 或3-醛取代的环戊酮环。 从后者可以通过已知的方法制备11-脱氧前列腺素。