Acidic derivatives of homocysteine thiolactone
    1.
    发明授权
    Acidic derivatives of homocysteine thiolactone 失效
    同型半胱氨酸硫内酯的酸性衍生物

    公开(公告)号:US5274122A

    公开(公告)日:1993-12-28

    申请号:US963324

    申请日:1992-10-15

    IPC分类号: C07D333/36 C07F9/6553

    CPC分类号: C07D333/36 C07F9/655345

    摘要: Homocysteine thiolactone derivatives in which the nitrogen is acylated with groups containing acidic functionalities have been synthesized. These include the succinyl, the carboxymethylglutaryl, the 3-phosphonopropionyl and the 3-sulfopropionyl derivatives. These thiolactones can be used to introduce a thiol functionality into proteins such as the outer membrane protein complex of Neisseria meninioitidis (OMPC) allowing conjugation with electrophilic ligands. This chemistry is similar to known N-acetyl-homocysteine thiolactone chemistry, but the pK.sub.a values are such that at pH 7, concomitant negative charge is introduced into the conjugate. Such negative charge neutralizes excess positive charge introduced when arginine- and lysine-rich peptides are bonded as ligands. In the case of OMPC, introduction of positive charge commonly effects irreversible precipitation of the conjugate. Conjugates prepared with the anionic thiolactones have improved solubility.

    摘要翻译: 已经合成了其中氮与含有酸性官能团的基团进行酰化的同型半胱氨酸硫内酯衍生物。 这些包括琥珀酰基,羧甲基葡萄糖基,3-膦酰基丙酰基和3-磺基丙酰基衍生物。 可以使用这些硫内酯将硫醇官能团引入蛋白质,例如允许与亲电子配体缀合的奈瑟氏球菌(OMPC)的外膜蛋白复合物。 该化学类似于已知的N-乙酰基 - 同型半胱氨酸硫内酯化学,但pKa值使得在pH7时,伴随的负电荷被引入缀合物中。 当富含精氨酸和富含赖氨酸的肽作为配体键合时,这种负电荷中和了引入的过量正电荷。 在OMPC的情况下,引入正电荷通常会影响缀合物的不可逆沉淀。 用阴离子硫醇内酯制备的缀合物具有改善的溶解性。

    Fluorodesulfurization of alkyl mercaptans or alkyl dithianes
    10.
    发明授权
    Fluorodesulfurization of alkyl mercaptans or alkyl dithianes 失效
    烷基硫醇或烷基二噻烷的脱硫

    公开(公告)号:US4049708A

    公开(公告)日:1977-09-20

    申请号:US663586

    申请日:1976-03-04

    CPC分类号: C07C227/16

    摘要: Organic compounds containing a mercapto group or a dithiane moiety can be transformed into the analogous fluoro or difluoro compounds by reacting them with a halogenating reagent in liquid hydrogen fluoride, optionally containing boron trifluoride or antimony pentafluoride solution, at temperatures from about -80.degree. and 15.degree. C. The method may be descriptively termed "fluorodesulfurization".

    摘要翻译: 含有巯基或二噻吩部分的有机化合物可以通过在约-80°和15°的温度下与任选含有三氟化硼或五氟化锑溶液的液体氟化氢中的卤化试剂反应而转化成类似的氟或二氟化合物 该方法可以被描述性地称为“氟代脱硫”。