Reference

Synthesis of phthalimid-3-yl and -4-yl aminoethylenes and pyrroloquinolines and a study of the fluorescence properties

Synthesis of phthalimid-3-yl and -4-yl aminoethylenes and pyrroloquinolines and a study of the fluorescence properties.Some chemicals with cas registry numbers like 20579-79-7 and 107070-47-3 are also used. Rangnekar, D. W.; Rajadhyaksha, D. D. (Dep. Chem. Technol., Univ. Bombay, Bombay 400 019, India). Dyes Pigm., 8(1), 1-10 (English) 1987. CODEN: DYPIDX. ISSN: 0143-7208. DOCUMENT TYPE: Journal CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) 3-Amino- (I) [20579-79-7] and 4-amino-N-phenylphthalimide (II) [20871-03-8] were condensed with di-Et ethoxymethylenemalonate [87-13-8], Et ethoxymethylenecycanoacetate [94-05-3], and Et ethoxymethyleneacetonate [3788-94-1] to obtain 1-N-(1-N-phenylphthalimid-3-yl)amino-2-disubstittued ethylenes and 1-N-(1-N-phenylphthalimid-4-yl)amino-2-disubstituted ethylenes, resp. The aminoethylenes contg. a 2-Et carboxylate substituent were cyclized in Downtherm A to give the corresponding 3-substituted 4-hydroxy-8-N-phenylpyrrolo[3,4-h]quinoline-7,9-diones and 3-substituted 4-hydroxy-7-N-phenylpyrrolo[3,4-g]quinoline-6,8-diones, resp. I and II were also condensed with Et orthoformate [122-51-0] and compds. contg. an active methylene or active Me group such as phenylacetonitrile [140-29-4], 2-methylbenzimidazole [615-15-6], and benzimidazol-2-ylacetonitrile [4414-88-4] to give different aminoethylene derivs. The fluorescent properties of all these products were studied and some of these compds. were applied to polyester fibers as fluorescent dyes. .

Process for preparation of photoactive quinolone carboxylic acid derivatives

Process for preparation of photoactive quinolone carboxylic acid derivatives. Kim, Gwang Rae; Lee, Gi Ryong; Oh, In Cheol; Park, Byeong Uk; Seo, Yeong Jun; Song, Bu Seop (Isu Chemical Co., Ltd., S. Korea). Repub. Korean Kongkae Taeho Kongbo KR 2003042386 A 28 May 2003, No pp. given (Korean). (Korea, Republic Of). CODEN: KRXXA7. CLASS: ICM: C07D491-052. APPLICATION: KR 2001-73128 22 Nov 2001. DOCUMENT TYPE: Patent CA Section: 28 (Heterocyclic Compounds (More Than One Hetero Atom)) A process for prepg. photoactive quinolone carboxylic acid derivs. is provided, thereby the photoactive quinolone carboxylic acid derivs. can be simply prepd. without a sepn. process. The process for prepg. photoactive quinolone carboxylic acid derivs. 110-85-0 and 94-05-3 which are cas registry numbers of chemicals are mentioned. of formula(1) comprises the steps of: reacting (S)-7,8-difluoro-2,3-dihydro-3-alkyl-4H-[1,4]benzoxazine of formula(2) with Et ethoxymethylene cyanoacetate of formula(3) to prep. a compd. of formula(4); reacting the compd. of formula(4) with 1-alkylpiperazine to prep. a compd. of formula(5); and hydrolysis of the compd. of formula(5) under the acidic or basic condition, wherein R1 is C1 to C4 alkyl; and R2 is Me or Et. .