Detail of "2169-87-1"

Reference

2,3-Naphthalenedicarboxylic acid

2,3-Naphthalenedicarboxylic acid. Maki, Takao; Asahi, Yoshio (Mitsubishi Chemical Industries Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 61221151 A2 1 Oct 1986 Showa, 3 pp. (Japan) CODEN: JKXXAF. CLASS: ICM: C07C063-38. ICS: B01J027-128; B01J031-04; B01J031-26; C07C051-265. APPLICATION: JP 85-62171 28 Mar 1985. DOCUMENT TYPE: Patent CA Section: 25 (Benzene, Its Derivatives, and Condensed Benzenoid Compounds) Section cross-reference(s): 41 The title compd. (I), useful as an intermediate for dyes, was prepd. by liq. phase oxidn. of 2,3-dimethylnaphthalene (II) in the presence of catalysts contg. Co, Mn, Zr, and Br. Thus, a mixt. of 7.0 g II, Co acetate, Mn acetate, Zr acetate, and NaBr (Zr/Co 0.30, Br/Co 1.16) in AcOH was autoclaved with air at 140° for 45 min to give 72.6% I.

2,3-Naphthalenedicarboxylic acid

2,3-Naphthalenedicarboxylic acid. Okushima, Hiromi; Nitta, Issei; Furuya, Rikizo (Mitsubishi Chemical Industries Co., Ltd., Japan). Japan. Kokai JP 52007945 21 Jan 1977 Showa, 4 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C07C063-38. APPLICATION: JP 75-83303 7 Jul 1975. DOCUMENT TYPE: Patent CA Section: 26 (Condensed Aromatic Compounds) 2,3-Naphthalenedicarboxylic acid (I) was prepd. by oxidn. of 2,3-dimethylnaphthalene (II) with O in an org. solvent contg. a heavy metal acetates-Br compds. catalyst while keeping .ltoreq.0.5M II concn. in the reaction mixt. Thus, 5.0 g II, 324 mg Ca(OAc)2, 323 mg Mn(OAc)2, 250 mg PhCH2Br, and 100 mL AcOH in an autoclave was treated with 50 L/h air at 120.degree./10 kg/cm2 to give 78.1% I, compared to 60.1% with 10 g II.