CAS: 3863-11-4; 3,4-Difluoroaniline

上下游产品

CAS号369-34-6 3,4-二氟硝基苯 | CAS号7439-89-6 铁粉 | CAS号85118-04-3 3,4-二氟苯甲酰胺 | CAS号5216-25-1 对氯三氯甲苯 | CAS号2494-79-3 4-氯-3-氯磺酰基苯甲酸 | CAS号62574-66-7 4-氯-3-(氯磺酰基)苯甲酰氯 | CAS号127269-25-4 Benzoyl fluorid... | CAS号371-40-4 4-氟苯胺 | CAS号1065275-51-5 1-(3,4-二氟苯基)-7,... | CAS号60811-24-7 3,4－二氟苯硫酚 | CAS号144298-04-4 N-(3,4-二氟苯基)氨基甲酸叔丁酯 | CAS号42601-04-7 异氰酸3,4-二氟苯酯 | CAS号205756-46-3 N-(3,4-二氟苯基)-2,... | CAS号194870-66-1 4,5-二氟-1H-吲哚-2-羧酸乙酯 | CAS号169674-34-4 5,6-二氟-1H-吲哚-2-羧酸乙酯 | CAS号221031-08-9 4,5-DIBROMO-2-(... | CAS号2145-85-9 (3,4-二氟苯基)氨基甲酸乙酯

4-氯三氯甲苯置于potassium Fluoride,氢氧化钾,Ammonium Hydroxide,氯化亚砜,Chlorosulphuric Acid,溴,四苯基溴化膦体系中,用 环丁砜,水,甲苯,乙腈,苯 作为反应溶剂,210.0 °C,36.0 Kpa 条件下,反应 30.0H,反应生成 3,4-二氟苯胺
参考文献:氟化钾交换法通用高效合成间氟芳烃
标题:氟化钾交换法通用高效合成间氟芳烃
摘要:发现四苯基溴化鏻是一种合适的催化剂,用于在化学计量量的邻苯二甲酰氯存在下,使带有氰基,硝基,氯羰基,三氟甲基和氯磺酰基的间硝基芳基衍生物与氟化钾反应,得到相应的间氟芳烃衍生品收益非常好.还发现该催化剂通过使用反应蒸馏技术对间(氟磺酰基)芳基衍生物进行氟脱磺酰化以提供间氟芳烃是有效的.
DOI:10.1246/bcsj.63.2010

专利信息

专利号:US-5521310-A
优先权日:1992-10-07
标 题 :Process to obtain benzoxazines to be used for the synthesis of ofloxazine, levofloxazine and derivatives
发明人：CARRETERO GONZALVEZ JUAN-CARLO; VICIOSO SANCHEZ MERCEDES; GARCIA RUANO JOSE-LUIS
权利人:ETILO DERIVADOS
摘要:A process to obtain benzoxazines useful for the synthesis of Ofloxazine, Levofloxazine and derivatives. The benzoxacines (I) where Xb is an halogen and R 1 is H, alkyl or alkenyl of up to 6 atoms of C or aryl, can be obtained by means of cycling a compound of formula (II) through the reaction with triphenylphosphine and ethyl azodicarboxilate. The compounds of formula (II) can be obtained through the reaction of a compound (III) with an adequate epoxide. Through the use of the adequate chiral epoxide it is possible to obtain the enantiomerically desired intermediate and, therefore and selectively, it is possible to obtain the desired final product with the adequate enantiomeric form without the need to carry out a resolution stage. n The Compounds (I) are useful and key intermediates for the synthesis of the antimicrobials Oflixazine and Levofloxazine. ##STR1##

专利号:US-5436368-A
优先权日:1990-10-31
标题:Intermediates in the preparation of 4,5-difluoroanthranillic acid
发明人：BRAISH TAMIM F
权利人:PFIZER
摘要:Compounds of the formula ##STR1## which are intermediates in the preparation of 4,5-difluoroanthranilic acid, an intermediate itself in the synthesis of quinolone antibacterials, and methods of preparing these intermediates.

专利号:EP-0332033-A2
优先权日:1988-03-11
标 题:N-cyclopropyl anilines and their use in processes for the synthesis of 1-cyclopropyl-quinolone-carboxylic acids and their derivatives
发明人：SCHRIEWER MICHAEL DR; PETERSEN UWE DR; GROHE KLAUS DR; KREBS ANDREAS DR
权利人:BAYER AG
摘要:N-Cyclopropylanilines of the formula (IV) in which R<1>, X<1>, X<2>, X<3>, A, Z and R<2> have the meaning given in the description, which are suitable for the preparation of 4-quinolone- 3-carboxylic acids, and processes for the preparation of quinolone- carboxylic acid derivatives using N-cyclopropylanilines.

专利号:US-6849650-B2
优先权日:1998-02-27
标 题:Heterocyclic compounds, pharmaceutical compositions comprising same, and methods for inhibiting β-amyloid peptide release and/or its synthesis by use of such compounds
发明人：THORSETT EUGENE D; PORTER WARREN J; NISSEN JEFFREY S; LATIMER LEE H; AUDIA JAMES E; DROSTE JAMES
权利人:ATHENA NEUROSCIENCES INC; LILLY CO ELI
摘要:Disclosed are compounds which inhibit β-amyloid peptide release and/or its synthesis, and, accordingly, have utility in treating Alzheimer's disease. Also disclosed are pharmaceutical compositions comprising a compound which inhibits β-amyloid peptide release and/or its synthesis as well as methods for treating Alzheimer's disease both prophylactically and therapeutically with such pharmaceutical compositions.

专利号:US-6399628-B1
优先权日:1996-11-22
标 题 :N-(aryl/heteroaryl) amino acid esters, pharmaceutical compositions comprising same, and methods for inhibiting alpha- amyloid peptide release and/or its synthesis by use of such compounds
发明人：AUDIA JAMES E; FOLMER BEVERLY K; JOHN VARGHESE; LATIMER LEE H; NISSEN JEFFREY S; REEL JON K; THORSETT EUGENE D; WHITESITT CELIA A
权利人:ATHENA NEUROSCIENCES INC; LILLY CO ELI
摘要:Disclosed are compounds which inhibit β-amyloid peptide release and/or its synthesis, and, accordingly, have utility in treating Alzheimer's disease. Also disclosed are pharmaceutical compositions comprising a compound which inhibits β-amyloid peptide release and/or its synthesis as well as methods for treating Alzheimer's disease both prophylactically and therapeutically with such pharmaceutical compositions.

专利号:EP-0951466-B1
优先权日:1996-12-23
标题:Cycloalkyl, lactam, lactone and related compounds, pharmaceutical compositions comprising same, and methods for inhibiting beta-amyloid peptide release and/or its synthesis by use of such compounds
发明人：WU JING; TUNG JAY S; THORSETT EUGENE D; PLEISS MICHAEL A; NISSEN JEFFREY S; NEITZ JEFFREY; LATIMER LEE H; JOHN VARGHESE; FREEDMAN STEPHEN; BRITTON THOMAS C; AUDIA JAMES E; REEL JON K; MABRY THOMAS E; DRESSMAN BRUCE A; CWI CYNTHIA L; DROSTE JAMES J; HENRY STEVEN S; MCDANIEL STACEY L; SCOTT WILLIAM L; STUCKY RUSSELL D
权利人:ELAN PHARM INC; LILLY CO ELI
摘要:Disclosed are compounds for Formula (I) wherein the substituents are as defined in the claims which inhibit β-amyloid peptide release and/or its synthesis, and, accordingly, have utility in treating Alzheimer's disease. Also disclosed are pharmaceutical compositions comprising a compound which inhibits β-amyloid peptide release and/or its synthesis as well as methods for treating Alzheimer's disease both prophylactically and therapeutically with such pharmaceutical compositions.