Intermediates in the preparation of 19-nor vitamin D compounds
    7.
    发明授权
    Intermediates in the preparation of 19-nor vitamin D compounds 失效
    中间体制备19-维生素D化合物

    公开(公告)号:US5525745A

    公开(公告)日:1996-06-11

    申请号:US410858

    申请日:1995-03-27

    摘要: The invention describes intermediates for use in the synthesis of 1.alpha.-hydroxy-19-nor-vitamin D compounds. The intermediates have the following formula: ##STR1## The disclosed process includes (a) the construction of a 5,8-diol-6-yne intermediate by joining ring-A and ring-C/D portions of the desired end product via the condensation of an acetylenic derivative containing the C/D-ring portion of the desired end product with a cyclic dihydroxy ketone representing the A-ring of the desired end product; (b) the partial reduction of the 6,7 acetylenic triple bond linkage between the A and C/D ring portions to obtain a 5,8-diol-6-ene intermediate; and (c) the reductive removal of the 5,8-oxygen functions to generate the required 5,7-diene end product from which the desired 7-trans(7E)-isomer is purified directly, or after optional double bond isomerization of the 7-cis(7Z)-isomer employing a novel thiophenol-promoted isomerization step.

    摘要翻译: 本发明描述了用于合成1α-羟基-19-去甲维生素D化合物的中间体。 中间体具有以下分子式:所公开的方法包括(a)通过将期望的最终产物的环A和环-C / D部分连接到所述中间体上来构建5,8-二醇-6-中间体 含有所需最终产物的C / D环部分的炔属衍生物与表示所需最终产物的A环的环状二羟基酮缩合; (b)部分还原A和C / D环部分之间的6,7炔基三键键,得到5,8-二醇-6-烯中间体; 或(c)还原去除5,8-氧官能团以产生所需的5,7-二烯最终产物,从其中直接纯化所需的7-反式(7E) - 异构体,或在任选的双键异构化 使用新的苯硫酚促进异构化步骤的7-顺式(7Z) - 异构体。

    Acetylenic cyclohexane triol derivatives
    8.
    发明授权
    Acetylenic cyclohexane triol derivatives 失效
    乙酸环己烷三醇衍生物

    公开(公告)号:US5488183A

    公开(公告)日:1996-01-30

    申请号:US448105

    申请日:1995-05-23

    摘要: A synthesis of 1.alpha.-hydroxy-19-nor-vitamin D compounds comprises (a) the construction of a 5,8-diol-6-yne intermediate by joining ring-A and ring-C/D portions of the desired end product via the condensation of an acetylenic derivative containing the C/D-ring portion of the desired end product with a cyclic dihydroxy ketone representing the A-ring of the desired end product; (b) the partial reduction of the 6,7 acetylenic triple bond linkage between the A and C/D ring portions to obtain a 5,8-diol-6-ene intermediate; and (c) the reductive removal of the 5,8-oxygen functions to generate the required 5,7-diene end product from which the desired 7-trans(7E)-isomer is purified directly, or after optional double bond isomerization of the 7-cis(7Z)-isomer employing a novel thiophenol-promoted isomerization step.

    摘要翻译: 1α-羟基-19-去甲维生素D化合物的合成包括(a)通过将期望的最终产物的环A和环-C / D部分连接而构建5,8-二醇-6-中间体 通过含有所需最终产物的C / D环部分的炔属衍生物与代表期望最终产物的A环的环状二羟基酮缩合; (b)部分还原A和C / D环部分之间的6,7炔基三键键,得到5,8-二醇-6-烯中间体; 或(c)还原去除5,8-氧官能团以产生所需的5,7-二烯最终产物,从其中直接纯化所需的7-反式(7E) - 异构体,或在任选的双键异构化 使用新的苯硫酚促进异构化步骤的7-顺式(7Z) - 异构体。

    Process for the continuous bulk production of acrylic polymers
    9.
    发明授权
    Process for the continuous bulk production of acrylic polymers 失效
    连续批量生产丙烯酸聚合物的方法

    公开(公告)号:US5243097A

    公开(公告)日:1993-09-07

    申请号:US979344

    申请日:1992-11-20

    摘要: Acetylenic derivatives of general formula ##STR1## in which R.sub.1 denotes a hydrogen atom or a phenyl radical or a radical of general formula ##STR2## in which R.sub.2 and R.sub.3, which may be identical or different, denote a hydrogen atom or a saturated or unsaturated aliphatic radical, substituted if appropriate, or form together a cycloaliphatic radical, R.sub.4 denotes a hydrogen atom or a saturated or unsaturated aliphatic radical, a hydroxy, alkyloxy, methanesulphonyloxy, benzenesulpnonyloxy or p-toluenesulphonyloxy radical, R.sub.5 denotes a hydrogen atom or a saturated aliphatic radical, R.sub.6 denotes a hydrogen atom or a saturated or unsaturated aliphatic radical are made by reaction of an acetylenic derivative of general formulaR.sub.1 --C.tbd.C--H (III)with an allyl derivative of general formula ##STR3## in the presence of a cuprous salt and an anhydrous organic base. The compounds of formula (I) are useful in organic synthesis, in particular in the preparation of the vitamins A and E.

    摘要翻译: 其中R 1表示氢原子或苯基或通式为(II)的基团,其中R 2和R 3可以相同或不同,表示氢原子的通式(ⅩⅧ)(Ⅰ)的乙炔衍生物 羟基,烷氧基,甲磺酰氧基,苯磺酰氧基或对甲苯磺酰氧基,R5表示氢原子或饱和或不饱和脂肪族基团, 氢原子或饱和脂肪族基团,R6表示氢原子或饱和或不饱和脂肪族基团,通过将通式R 1 -C 3 3BOND CH(III)的炔属衍生物与通式为“IMAGE”的烯丙基衍生物 IV)或(VI)化合物在乙酸盐和无水有机碱的存在下反应。 式(I)化合物可用于有机合成,特别是维生素A和E的制备。