Chemical compounds
    22.
    发明授权
    Chemical compounds 失效
    化合物

    公开(公告)号:US4193917A

    公开(公告)日:1980-03-18

    申请号:US713649

    申请日:1976-08-12

    IPC分类号: C07D205/095 C07D205/06

    CPC分类号: C07D205/095

    摘要: Novel semisynthetic .beta.-lactam intermediates of use in the production of cephalosporins, penicillins and related .beta.-lactam antibiotic compounds are provided. The novel compounds are prepared from .beta.-lactams obtained by cleavage of the 1,2-sulphur-carbon bond of a penicillin 1-oxide (with subsequent internal or external trapping of the sulphur atom to leave a residual substituent as the .beta.-lactam nitrogen) by removal of the said residual substituent by an oxidative cleavage reaction.

    摘要翻译: 提供了用于生产头孢菌素,青霉素和相关β-内酰胺抗生素化合物的新型半合成β-内酰胺中间体。 新化合物由通过切割青霉素1-氧化物的1,2-硫 - 碳键获得的β-内酰胺制备(随后硫原子的内部或外部捕获而留下残余取代基作为β-内酰胺氮 )通过氧化裂解反应除去所述残留取代基。

    Production of (-)dodecahydro-3a,6,6,9a-tetramethyl-naphtho[2,1-b] furan
    24.
    发明授权
    Production of (-)dodecahydro-3a,6,6,9a-tetramethyl-naphtho[2,1-b] furan 失效
    ( - )十二氢-3a,6,9,9-四甲基 - 萘并[2,1-b]呋喃的生产

    公开(公告)号:US5473085A

    公开(公告)日:1995-12-05

    申请号:US314507

    申请日:1994-09-28

    IPC分类号: C07D307/92

    CPC分类号: C07D307/92

    摘要: Preparation of a methyl ketone intermediate useful in the synthesis of (-)-dodecahydro-3a,6,6, 9a-tetramethyl-naphtho(2,1-b) furan by subjecting (-)-sclareol to ozonolysis in the presence of iodine or iodine-containing compound. The intermediate can be converted to (-)-dodecahydro-3a,6,6,9a-tetramethyl-naphtho(2,1-b) furan by Baeyer-Villiger oxidation followed by reduction of the resulting product in the presence of a Lewis acid.

    摘要翻译: ( - ) - 十二氢-3a,6,6,9a-四甲基萘并(2,1-b)呋喃的合成中使用( - ) - 香紫苏醇在碘存在下进行臭氧分解的甲基酮中间体的制备 或含碘化合物。 可以通过Baeyer-Villiger氧化将中间体转化为( - ) - 十二氢-3a,6,6,9a-四甲基萘并(2,1-b)呋喃,然后在路易斯酸存在下还原所得产物 。

    Compositions and method
    26.
    发明授权
    Compositions and method 失效
    组合和方法

    公开(公告)号:US4490296A

    公开(公告)日:1984-12-25

    申请号:US462684

    申请日:1983-01-31

    摘要: A novel nitromethylation composition comprising nitromethane and a catalytic amount of a bifunctional basic catalyst, optionally in an organic solvent, a method of nitromethylating ketonic compounds with said compositions and novel steroids of the formulae ##STR1## wherein R.sub.1 is selected from the group consisting of hydrogen, alkyl of 1 to 4 carbon atoms optionally substituted with an oxygen or nitrogen group or halogen and alkenyl and alkynyl of 2 to 4 carbon atoms, R.sub.2 is alkyl of 1 to 4 carbon atoms and the A,B,C and D rings optionally contain at least one double bond and optionally substituted with at least one member of the group consisting of --OH, .dbd.0, halogen, alkyl and alkoxy of 1 to 4 carbon atoms and alkenyl and alkynyl of 2 to 4 carbon atoms and their use to form the corresponding 21-acetoxy-20-ketocorticosteroids compounds in a simple manner.

    摘要翻译: 一种包含硝基甲烷和催化量的双功能碱性催化剂,任选在有机溶剂中的新型硝基甲基化组合物,具有所述组合物的酮化合物的硝基甲基化方法以及式I和I'的新类固醇,其中R1是 选自氢,任选被氧或氮基团取代的1至4个碳原子的烷基或2至4个碳原子的链烯基和炔基,R 2是1至4个碳原子的烷基,A,B C和D环任选地含有至少一个双键并任选被至少一个由以下组成的组取代:-OH,= 0,卤素,具有1至4个碳原子的烷基和烷氧基,以及2至4个的烯基和炔基 碳原子和它们用于以简单的方式形成相应的21-乙酰氧基-20-酮皮质类固醇化合物。

    Polymeric pH-sensitive optical filter agents having hydrazone moieties
attached thereto
    27.
    发明授权
    Polymeric pH-sensitive optical filter agents having hydrazone moieties attached thereto 失效
    具有连接有腙部分的聚合物pH敏感光学滤光剂

    公开(公告)号:US4468494A

    公开(公告)日:1984-08-28

    申请号:US250401

    申请日:1981-04-02

    IPC分类号: G03C8/48 C08F8/34 C08F8/30

    CPC分类号: G03C8/48

    摘要: Polymeric optical filter agents and photographic products and processes using same are disclosed. The polymeric optical filter agents are pH-sensitive optical filter agents comprising polymeric backbone units having the following hydrazone moiety: ##STR1## where R is a group which can provide a double bond for conjugation with the ##STR2## portion of the moiety to provide light-absorbing capability for the agent at a pH above its pKa, and X represents a substituent of R providing at least one electron-withdrawing group. The polymeric pH-sensitive optical filter agents have a highly colored light-absorbing form at a pH above the pKa and are substantially non-absorbing at a pH below the pKa. The polymeric optical filter agents are useful in photographic film units and processes for the protection of photoexposed photosenstive elements against the occurence of fogging during in-light development.

    摘要翻译: 公开了聚合物光学滤光剂和使用它们的照相产品和方法。 聚合物光学过滤剂是pH敏感的光学过滤剂,其包含具有以下腙部分的聚合物主链单元:其中R是能够提供双键以与该部分的“IMAGE”部分缀合以提供光的基团 - 在高于其pKa的pH下的试剂的吸收能力,X表示提供至少一个吸电子基团的R的取代基。 聚合物pH敏感光学过滤剂在高于pKa的pH下具有高度着色的光吸收形式,并且在低于pKa的pH下基本上不吸收。 聚合物光学滤光剂可用于照相胶片单元和用于保护光敏光敏元件免于在光照显影过程中发生雾化的过程。

    Oxidation process using tellurium oxide catalysts
    29.
    发明授权
    Oxidation process using tellurium oxide catalysts 失效
    使用碲氧化物催化剂的氧化工艺

    公开(公告)号:US4370497A

    公开(公告)日:1983-01-25

    申请号:US175847

    申请日:1980-08-07

    摘要: The present invention relates to the use of telluroxides as mild and selective oxidizing agents serving to oxidize certain functions, notably >C.dbd.S groups, in the presence of other relatively easily oxidized functions which remain unaffected; telluroxides of interest as oxidizing agents include, for example, compounds of the formula: ##STR1## wherein R and R.sup.1, which may be the same or different, each represent an optionally substituted aryl or heterocyclic group; or R and R.sup.1 together with the tellurium atom therebetween represent a heterocyclic ring, which may contain one or more further heteroatoms, and which may carry substituents and/or fused aromatic rings.

    摘要翻译: 本发明涉及在存在其它相对容易被氧化的功能而不受影响的情况下,用作氧化某些功能的特氟隆(特别是> C = S基)的氟氯化铁作为温和和选择性氧化剂的用途; 感兴趣的氧化铁作为氧化剂包括例如下式的化合物:其中R和R 1可以相同或不同,各自表示任选取代的芳基或杂环基; 或R和R 1与它们之间的碲原子表示杂环,其可以含有一个或多个另外的杂原子,并且其可以携带取代基和/或稠合芳环。

    Optical filter agents and photographic products and processes containing
same
    30.
    发明授权
    Optical filter agents and photographic products and processes containing same 失效
    光学过滤剂和含有它们的摄影产品和方法

    公开(公告)号:US4298676A

    公开(公告)日:1981-11-03

    申请号:US89559

    申请日:1979-10-29

    CPC分类号: G03C8/48

    摘要: Optical filter agents and photographic products and processes using same are disclosed. The optical filter agents are pH-sensitive hydrazone compounds conforming to the following structural formula: ##STR1## where R is any group which can provide a double bond for conjugation with the ##STR2## portion of the compound to provide light-absorbing capability or color for the agent at a pH above its pKa, X is a substituent of R providing at least one electron-withdrawing group and each R' can be defined as any substituent that does not impair the light-absorbing capacity of the compound at a pH above the pKa thereof. The pH-sensitive optical filter agents have a highly colored light-absorbing form at a pH above the pKa and are substantially non-absorbing at a pH below the pKa. The pH-sensitive optical filter agents are useful in photographic film units and processes for the protection of photoexposed photosensitive elements against the occurence of fogging during in-light development.

    摘要翻译: 公开了使用其的光学过滤剂和照相产品和方法。 光学过滤剂是符合以下结构式的pH敏感腙化合物:其中R是可以提供双键与化合物的部分缀合以提供光吸收能力或颜色的任何基团 对于高于其pKa的pH的试剂,X是提供至少一个吸电子基团的R的取代基,并且每个R'可以被定义为在上述pH以上不会损害化合物的光吸收能力的任何取代基 其pKa。 pH敏感的光学过滤剂在高于pKa的pH下具有高度着色的光吸收形式,并且在低于pKa的pH下基本上不吸收。 pH敏感的光学滤光剂可用于照相胶片单元和用于保护光敏元件的过程,以防止在光照显影过程中发生起雾。