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1. (WO2019062561) SYNTHESIS METHODS OF FIROCOXIB AND INTERMEDIATE THEREOF
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Pub. No.: WO/2019/062561 International Application No.: PCT/CN2018/105661
Publication Date: 04.04.2019 International Filing Date: 14.09.2018
IPC:
C07C 49/233 (2006.01) ,C07C 45/68 (2006.01) ,C07C 45/46 (2006.01) ,C07C 315/04 (2006.01) ,C07C 317/24 (2006.01) ,C07D 307/60 (2006.01)
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
49
Ketones; Ketenes; Dimeric ketenes; Ketonic chelates
20
Unsaturated compounds containing keto groups bound to acyclic carbon atoms
227
containing halogen
233
containing six-membered aromatic rings
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
45
Preparation of compounds having CO groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
61
by reactions not involving the formation of CO groups
67
by isomerisation; by change of size of the carbon skeleton
68
by increase in the number of carbon atoms
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
45
Preparation of compounds having CO groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
45
by condensation
46
Friedel-Crafts reactions
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
315
Preparation of sulfones; Preparation of sulfoxides
04
by reactions not involving the formation of sulfone or sulfoxide groups
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
317
Sulfones; Sulfoxides
24
having sulfone or sulfoxide groups and doubly-bound oxygen atoms bound to the same carbon skeleton
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
D
HETEROCYCLIC COMPOUNDS
307
Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
02
not condensed with other rings
34
having two or three double bonds between ring members or between ring members and non-ring members
56
with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
60
Two oxygen atoms, e.g. succinic anhydride
Applicants:
SICHUAN QINGMU PHARMACEUTICAL CO., LTD. [CN/CN]; No. 55, South Shunjiang Avenue East Economic Development Zone Meishan, Sichuan 612100, CN
Inventors:
WANG, Ying; CN
LI, Xiaoxun; CN
LIU, Shikui; CN
LU, Tiegang; CN
DENG, Xianhua; CN
Agent:
BEIJING SUNHOPE INTELLECTUAL PROPERTY LTD.; Suite 1106, Kunxun Plaza Zhichun Road 9, Haidian District Beijing 100191, CN
Priority Data:
201710902982.728.09.2017CN
Title (EN) SYNTHESIS METHODS OF FIROCOXIB AND INTERMEDIATE THEREOF
(FR) PROCÉDÉS DE SYNTHÈSE DE FIROCOXIB ET INTERMÉDIAIRE DE CELUI-CI
Abstract:
(EN) Provided herein the synthesis methods of firocoxib and an intermediate thereof. The synthesis of the first intermediate is performed through methylation of p-bromopropiophenone or through Friedel-Crafts acylation of bromobenzene, avoiding the use of environmental unfriendly thioethers as starting materials. The second intermediate is directly obtained by sulfonation of the first intermediate, wherein the sulfidation reaction and the oxidization reaction are shortened to one-step reaction. The sulfonation step greatly simplifies the reaction steps, shortens the reaction time, and improves the reaction efficiency. Meanwhile, an N-bromosuccinimide(NBS) catalyst system is also adopted in the hydroxylation of the second intermediate to directly obtain the firocoxib intermediate. Such an environmental friendly method is suitable for large-scale production, and the reaction rate is increased. In addition, the firocoxib synthesis method comprises the synthesis method of the firocoxib intermediate and can prepare firocoxib in a milder and more environmentally friendly manner.
(FR) L'invention concerne des procédés de synthèse de firocoxib et d'un intermédiaire de celui-ci. La synthèse du premier intermédiaire est effectuée par méthylation de p-bromopropiophénone ou par acylation de Friedel-Crafts de bromobenzène, évitant l'utilisation de thioéthers non-écologiques en tant que matières premières. Le second intermédiaire est directement obtenu par sulfonation du premier intermédiaire, la réaction de sulfuration et la réaction d'oxydation étant raccourcies à une réaction en une seule étape. L'étape de sulfonation simplifie de manière considérable les étapes de réaction, raccourcit le temps de réaction, et améliore l'efficacité de celle-ci. L'invention concerne également un système de catalyseur de N-bromosuccinimide (NBS) adopté dans l'hydroxylation du second intermédiaire pour obtenir directement l'intermédiaire de firocoxib. Un tel procédé respectueux de l'environnement est approprié pour une production à grande échelle, et le taux de réaction est augmenté. Le procédé de synthèse de firocoxib, selon la présente invention comprend le procédé de synthèse de l'intermédiaire de firocoxib et permet de préparer du firocoxib d'une manière plus modérée et plus respectueuse de l'environnement.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)