CAS: 183158-34-1; 2,3-Dimethylphenylboronic Acid

上下游产品

CAS号576-23-8 3-溴邻二甲苯 | CAS号5419-55-6 硼酸三异丙酯 | CAS号55171-60-3 2-溴-3,4-二甲氧基苯甲醛 | CAS号121-43-7 硼酸三甲酯 | CAS号1261894-01-2 4-(2,3-dimethyl...

专利信息

专利号:US-7425650-B1
优先权日:2004-07-23
标 题 :Synthesis of asymmetric tetracarboxylic acids and corresponding dianhydrides
发明人：CHUANG CHUN-HUA
权利人:NASA
摘要:This invention relates to processes for preparing asymmetrical biphenyl tetracarboxylic acids and the corresponding asymmetrical dianhydrides, namely 2,3,3′,4′-biphenyl dianhydride (a-BPDA), 2,3,3′,4′-benzophenone dianhydride (a-BTDA) and 3,4′-methylenediphthalic anhydride (-MDPA). By cross-coupling reactions of reactive metal substituted o-xylenes or by cross-coupling o-xylene derivatives in the presence of catalysts, this invention specifically produces asymmetrical biphenyl intermediates that are subsequently oxidized or hydrolyzed and oxidized to provide asymmetric biphenyl tetracarboxylic acids in comparatively high yields. These asymmetrical biphenyl tetracarboxylic acids are subsequently converted to the corresponding asymmetrical dianhydrides without contamination by symmetrical biphenyl dianhydrides.

专利号:US-8207337-B2
优先权日:2007-01-29
标 题:Reagent for organic synthesis reaction containing organic triol borate salt
发明人：MIYAURA NORIO; YAMAMOTO YASUNORI
权利人:MIYAURA NORIO; YAMAMOTO YASUNORI; WAKO PURE CHEM IND LTD
摘要:[Problem] n To provide an organoboron compound-containing reagent for organic synthesis reactions which undergoes no trimerization with dehydration, does not necessitate activation with a base, and is stable and highly active. n [Means for Solving Problems] n The reagent for organic synthesis reactions contains an organic triol borate salt represented by any of the general formulae (I) to (III) and general formula (XVI): (wherein R 1 represents alkyl, alkenyl, etc.; R 2 represents optionally substituted alkyl, alkenyl, alkynyl, etc. or represents hydrogen; m + represents an alkaline metal ion, phosphonium ion, or given ammonium ion; M 2+ represents an alkaline earth metal; X represents halogen or alkoxide; Y represents an alkali metal ion, etc.; A represents optionally substituted methylene; and n represents an integer).

专利号:US-7381849-B1
优先权日:2004-07-23
标题:Synthesis of asymmetric tetracarboxylic acids and dianhydrides

专利号:US-9988371-B2
优先权日:2014-06-03
标 题:Benzimidazole analogues and related methods
发明人：LI HONG-YU; FRETT BRENDAN; SANTORO MASSIMO; CARLOMAGNO FRANCESCA
权利人:UNIV ARIZONA; UNIV FEDERICO II; UNIV ARIZONA
摘要:The invention relates to compounds of the formula (VIII) wherein the moieties R 1 , R 2 , R 3 , R 4 , and R 5 are as defined in the specification, and salts thereof, as well as their use, methods of use for them, methods of their synthesis, and the like. The compounds are protein tyrosine kinase inhibitors and can be used in the treatment of various cancer diseases and cancer-associated pain.

专利号:CN-108558677-A
优先权日:2018-04-13
标题 :A kind of highly convoluted cross-conjugated organic compound and its synthesis method

专利号:CN-119798196-A
优先权日:2024-11-30
标 题:Synthesis method of 2, 3',4' -biphenyl tetracarboxylic dianhydride