Derivatives of p-substituted phenyl ester of pivalic acid
    116.
    发明授权
    Derivatives of p-substituted phenyl ester of pivalic acid 失效
    新戊酸对取代苯基酯的衍生物

    公开(公告)号:US5017610A

    公开(公告)日:1991-05-21

    申请号:US364994

    申请日:1989-06-12

    摘要: A derivative of general formula: ##STR1## wherein Y is --SO.sub.2 -- or ##STR2## (i) R.sup.1 and R.sup.2, which may be the same or different, each represent, (1) --H, (2) C1-16 alkyl or (3) the formula: --X-- .circle.A --(R.sup.4).sub.n wherein X is a single-bond, --SO.sub.2 --, C1-4 alkylene, C1-4 alkylene substituted by ##STR3## -- .circle.A -- is carbocyclic or heterocyclic ring, n is 1.about.5, R.sup.4 is (1) --H or C1-8 alkyl, (2) C1-14 alkoxy, (3) C1-6 alkylthio, (4) --OH, halogen, --NO.sub.2 or trihalomethyl, (5) the formula: --NR.sup.41 R.sup.42 wherein R.sup.41 and R.sup.42 each represents halogen or C1-4 alkyl, (6) tetrazole, (7) --SO.sub.3 H or --CH.sub.2 OH, (8) the formula: --SO.sub.2 NR.sup.41 R.sup.42 (9) the formula: --Z.sup.41 --COOR.sup.43 wherein Z.sup.41 is single-bond, C1-4 alkylene or C2-4 alkenylene, R.sup.43 is --H, C1-4 alkyl or benzyl, (10) the formula: --CONR.sup.41 R.sup.42 (11) the formula: --COO--Z.sup.42 --COOR.sup.43 wherein Z.sup.42 is C1-4 alkylene, R.sup.43 is --H, C1-4 alkyl or benzyl, (12) the formula: --COO--Z.sup.42 --CONR.sup.41 R.sup.42 (13) the formula: --OCO--R.sup.45 wherein R.sup.45 is C1-8 alkyl or p-guanidinophenyl, (14) the formula: --CO--R.sup.46 wherein R.sup.46 is C1-4 alkyl, (15) the formula: --O--Z.sup.43 --COOR.sup.450 wherein Z.sup.43 is C1-6 alkylene, R.sup.450 represents a hydrogen, C1-8 alkyl or p-guanidinophenyl, (16) the formula: ##STR4## wherein ##STR5## is an amino acid residue, R.sup.47 is bond, C1-4 alkyl, R.sup.48 is --H or C1-4 alkyl, R.sup.49 is --OH, C1-4 alkoxy, --NH.sub.2, amino substituted by one or two C1-4 alkyl, carbamoylmethoxy or carbamoylmethoxy substituted by one or two C1-4 alkyl at N atom of carbamoyl, wherein ##STR6## is C3-6 heterocyclic ring, (ii) R.sup.1, R.sup.2 and N atom bonded to R.sup.1 and R.sup.2 together represents heterocyclic ring containing at least a N atom(s) and substituted by --COOH or unsubstituted heterocyclic ring containing at least a N atom(s), R.sup.3 is (1) --H, (2) --OH, (3) C1-6 alkyl, (4) halogen, (5) C1-4 alkoxy or (6) C2-5 acyloxy, m is 1-4.or non-toxic salt or an acid addition salt thereof possess inhibitory activity on elastase, and therefore is useful for treating and/or preventing agent for pulmonary emphysema, atherosclerosis and rheumatoid arthritis and the like.

    Method of preparing salts of N-acetyl cysteine or N-acetyl homocysteine
    118.
    发明授权
    Method of preparing salts of N-acetyl cysteine or N-acetyl homocysteine 失效
    制备N-乙酰半胱氨酸或N-乙酰基高半胱氨酸盐的方法

    公开(公告)号:US4918224A

    公开(公告)日:1990-04-17

    申请号:US230026

    申请日:1988-08-09

    CPC分类号: C07C319/12

    摘要: Salts of N-acetyl cysteine and N-acetyl homocysteine are prepared by reacting acetonitrile with cysteine or homocysteine in an aqueous or aqueous-organic medium adjusted to a pH in the range of 8 to 10 with a base supplying the cation of the salt. The reaction is carried out at a temperature in the range of 0.degree. C. to the boiling temperature of the reaction mixture.

    摘要翻译: N-乙酰半胱氨酸和N-乙酰基同型半胱氨酸的盐通过乙腈与半胱氨酸或高半胱氨酸在水性或水性有机介质中的反应来制备,该介质调节至8至10范围内的pH,并提供盐的阳离子。 反应在0℃至反应混合物的沸点温度下进行。