专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US5674670A 2-hydroxyphenyl benzotriazole based UV absorbing polymers with particular substituents and photographic elements containing them 失效
标题翻译：具有特定取代基的2-羟基苯基苯并三唑基UV吸收聚合物和含有它们的照相元件
公开(公告)号：US5674670A
公开(公告)日：1997-10-07
申请号：US617447
申请日：1996-03-18
申请人： Lal Chand Vishwakarma , Hwei-Ling Yau , Tienteh Chen
发明人： Lal Chand Vishwakarma , Hwei-Ling Yau , Tienteh Chen
IPC分类号： C08F20/36 , G03C1/815
CPC分类号： C08F20/36 , G03C1/8155 , Y10S430/132
摘要： A photographic element comprising a light sensitive portion and an ultraviolet absorbing polymer comprising repeating units of a 2'-hydroxphenyl benzotriazole with a 5- or 6-substituent selected from halogen, cyano, carboxy or a sulfonyl, and a 4'-alkoxy group in which the alkylene portion of the alkoxy is linked, in sequence through a first optional bivalent linking group, then an oxygen, sulfur or amino group, then a second optional bivalent linking group, to the polymer chain, provided that the 3'-position is unsubsituted and the 4'-substituent does not have any --NH--, --OH or --SH substituents.
摘要翻译：一种照相元件，包括光敏部分和紫外线吸收聚合物，其包含2'-羟基苯基苯并三唑与选自卤素，氰基，羧基或磺酰基的5-或6-取代基的重复单元和4'-烷氧基其中烷氧基的亚烷基部分通过第一任选的二价连接基团，然后是氧，硫或氨基，然后是第二任选的二价连接基团连接到聚合物链上，条件是3'-位是未取代并且4'-取代基不具有任何-NH-，-OH或-SH取代基。

2. 发明授权

US5756740A Process for the preparation of binary sensitizing dyes 失效
标题翻译：二元敏化染料的制备方法
公开(公告)号：US5756740A
公开(公告)日：1998-05-26
申请号：US865165
申请日：1992-04-08
申请人： Lal Chand Vishwakarma , Chin Hsin Chen
发明人： Lal Chand Vishwakarma , Chin Hsin Chen
IPC分类号： C09B23/00 , C09B23/02 , C09B23/10 , C09B57/02 , C09K3/00 , G03C1/08 , G03C1/10 , G03C1/12 , G03C1/22 , C07D401/00 , C07D235/04 , C07D235/20 , C07D403/00 , C07D417/00 , C07D209/148
CPC分类号： C09B57/02 , C09B23/02 , C09B23/10 , G03C1/12
摘要： A process for the preparation of photographic binary sensitizing dyes, which comprise two separate, nonconjugated chromophores, one of which has the capability of adsorbing to a silver halide grain surface, the other of which is substantially non-adsorbing to silver halide. The process comprises reacting two dye compounds in a solvent in the presence of a 2-halo-1-alkylpyridinium salt and a 4-dialkylaminopyridine.
摘要翻译：一种用于制备照相二元增感染料的方法，其包含两个单独的非共轭发色团，其中一种具有吸附到卤化银颗粒表面的能力，其中一种基本上不吸附至卤化银。该方法包括在2-卤代-1-烷基吡啶鎓盐和4-二烷基氨基吡啶存在下，在溶剂中使两种染料化合物反应。

3. 发明授权

US5739348A Method of synthesizing tert-amido-substituted 2-(2'-hydroxyphenyl) benzotriazole compounds in a one-step process 失效
标题翻译：叔 - 酰氨基取代的2-（2'-羟基苯基）苯并三唑化合物的一步法合成方法
公开(公告)号：US5739348A
公开(公告)日：1998-04-14
申请号：US735544
申请日：1996-10-23
申请人： Lal Chand Vishwakarma , Victor LaVonne Mylroie
发明人： Lal Chand Vishwakarma , Victor LaVonne Mylroie
IPC分类号： B01J23/44 , C07B61/00 , C07D249/20 , C09K3/00
CPC分类号： C07D249/20
摘要： A method for preparing a compound of formula (III): ##STR1## wherein: R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, L, Z and p are as defined in the specification; said process preferably comprising either a noble metal catalyzed hydrogenation or a non-catalytic reductive ring closure of an azo dye compound of formula (IV): ##STR2## where R11 is as defined in the specification, thereby performing a reductive ring closure and selective O-deacylation in a single process step.
摘要翻译：制备式（III）化合物的方法：其中：R1，R2，R3，R4，R5，R6，R7，R8，L，Z和p如说明书中所定义; 所述方法优选包含式（IV）的偶氮染料化合物的贵金属催化氢化或非催化还原性环闭合：其中R 11如说明书中所定义，从而进行还原性环闭合并在单一工艺步骤中选择性O-脱酰化。

4. 发明授权

US5670654A Method of synthesizing 2-(2'-hydroxyphenyl) benzotriazole compounds 失效
标题翻译：合成2-（2'-羟基苯基）苯并三唑化合物的方法
公开(公告)号：US5670654A
公开(公告)日：1997-09-23
申请号：US602946
申请日：1996-02-16
申请人： Lal Chand Vishwakarma
发明人： Lal Chand Vishwakarma
IPC分类号： C07D249/20
CPC分类号： C07D249/20 , Y02P20/55
摘要： A method for preparing a compound of formula (VII): ##STR1## wherein: R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and X are defined in the specification; the method comprising: protecting at least --XH on a compound of formula (IV) below to form a protected formula (IV) compound, by forming --X(PG) where PG is a group other than H which is not removed during a subsequent ring closure step: ##STR2## performing a ring closure by reacting the protected formula (IV) compound with a reducing agent to form a compound of formula (VI): ##STR3## wherein Z is H or a protecting group; deprotecting the compound of formula (VI) to form the compound of formula (VII) by replacing PG with H and, when Z is not H, also replacing Z with H.
摘要翻译：（VII）化合物的制备方法：其中：R1，R2，R3，R4，R5，R6，R7和X在本说明书中定义; 所述方法包括：通过形成-X（PG），其中PG是除H之外的基团，在随后的其中不被除去的情况下，通过以下方式保护式（IV）化合物上至少-XH以形成受保护的式（IV）化合物闭环步骤：（IV）通过使保护的式（IV）化合物与还原剂反应形成式（VI）化合物进行闭环：其中Z为H或保护基组; 通过用H代替PG，并且当Z不为H时，用H代替Z，使式（VI）化合物脱保护形成式（VII）化合物。

5. 发明授权

US5675015A Process for the preparation of benzotriazole derivatives 失效
标题翻译：苯并三唑衍生物的制备方法
公开(公告)号：US5675015A
公开(公告)日：1997-10-07
申请号：US611964
申请日：1996-03-07
申请人： Lal Chand Vishwakarma , Victor LaVonne Mylroie , Louis Francis Valente , Barry Francis Briffa
发明人： Lal Chand Vishwakarma , Victor LaVonne Mylroie , Louis Francis Valente , Barry Francis Briffa
IPC分类号： C07D249/20 , C09K3/00
CPC分类号： C07D249/20
摘要： 2-(2'-Hydroxyphenyl)-2H-benzotriazoles of formula (I): ##STR1## wherein: R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8 and Z are defined in the specification, are prepared by catalytic hydrogenation of a suitable o-nitroazo dye compound in the presence of a PtS, Pt, Pd, Pt/Pd or other noble metal hydrogenation catalyst, in the presence of a base, an acid and a hydroxylic solvent.
摘要翻译：式（I）的2-（2'-羟基苯基）-2H-苯并三唑：其中：R1，R2，R3，R4，R5，R6，R7，R8和Z在说明书中定义为在PtS，Pt，Pd，Pt / Pd或其它贵金属加氢催化剂存在下，在碱，酸和羟基溶剂的存在下，通过合适的邻硝基偶氮染料化合物的催化氢化制备。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式