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1. (WO2014199400) CARBAZOLE DIOXAZINE PIGMENT AND A METHOD FOR ITS PREPARATION
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2014/199400    International Application No.:    PCT/IN2014/000388
Publication Date: 18.12.2014 International Filing Date: 11.06.2014
IPC:
C09B 5/26 (2006.01), C09B 5/60 (2006.01), C07D 498/22 (2006.01), C07D 498/04 (2006.01)
Applicants: GHARDA, Keki Hormusji [IN/IN]; (IN)
Inventors: GHARDA, Keki Hormusji; (IN)
Agent: MOHAN, Dewan; R.K. Dewan & Company Trade Mark & Patent Attorneys Podar Chambers, S.A. Brelvi Road, Fort Mumbai 400001 Maharashtra (IN)
Priority Data:
1990/MUM/2013 11.06.2013 IN
Title (EN) CARBAZOLE DIOXAZINE PIGMENT AND A METHOD FOR ITS PREPARATION
(FR) PIGMENT À BASE DE CARBAZOLE-DIOXAZINE ET SON PROCÉDÉ DE PRÉPARATION
Abstract: front page image
(EN)The present disclosure provides carbazole-dioxazine pigment of Formula I; wherein, R is C1-C8 alkyl group, preferably R is an ethyl group, R1 is a chloro group, and R2 is a -NHC(=O)Ph group. The pigment is synthesized from 3-nitro-N-ethylcarbazole. The first step is nitration of 3-nitro-N-ethylcarbazole to form 3,6-dinitro-N-ethylcarbazole which is reduced to form 3-amino-6-nitro-N-ethylcarbazole. This amino compound is benzoylated to form 3-benzamido-6-nitro-N-ethylcarbazole which is then hydrogenated to form 6-amino-3-benzamido-N-ethylcarbazole. Condensation of 6-amino-3-benzamido-N-ethylcarbazole with chlroanil provides an intermediate. Cyclization of the intermediate in the presence of a cyclization reagent provides the compound of Formula-I. The pigment has wavelength of maximum absorption (λmax) at 571nm in dimethylformamide as a solvent.
(FR)Cette divulgation concerne un pigment à base de carbazole-dioxazine de Formule I; dans laquelle R est un groupe alkyle C1-C8, de préférence R est un groupe éthyle, R1 est un groupe chloro; et R2 est un groupe -NHC(=O)Ph. Le pigment est synthétisé à partir de 3-nitro-N-éthylcarbazole. La première étape est la nitration du 3-nitro-N-éthylcarbazole pour former un 3,6-dinitro-N-éthylcarbazole qui est réduit pour former un 3-amino-6-nitro-N-éthylcarbazole. Ce composé amino est benzoylé pour former un 3-benzamido-6-nitro-N-éthylcarbazole qui est ensuite hydrogéné pour former un 6-amino-3-benzamido-N-éthylcarbazole. La condensation du 6-amino-3-benzamido-N-éthylcarbazole avec du chloranil donne un intermédiaire. La cyclisation de l'intermédiaire en présence d'un réactif de cyclisation donne le composé de Formule I, à savoir le pigment selon l'invention ayant une longueur d'onde d'absorption maximale (λmax) à 571nm dans du diméthylformamide à titre de solvant.
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, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, 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 (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (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)