Detail of "275-51-4"

Reference

Preparation of azulene derivatives

Preparation of azulene derivatives. Nozoe, Tetsuo; Takagi, Koichi; Mizuno, Akira; Shiroyama, Takahiro (Kao Corp., Japan). Jpn. Kokai Tokkyo Koho JP 04108750 A2 9 Apr 1992 Heisei, 6 pp. (Japan). CODEN: JKXXAF. CLASS: ICM: C07C035-34. ICS: C07C029-38. APPLICATION: JP 90-224118 24 Aug 1990. DOCUMENT TYPE: Patent CA Section: 24 (Alicyclic Compounds) Azulene derivs. [I; R1, R3 = H, (substituted) aliph. or arom. hydrocarbyl, cyano, (substituted) acyl, aroyl, alkoxycarbonyl, etc.; R2 = (substituted) aryl, CR5R6R7; R5 = (substituted) aryl; R6, R7 = H, (substituted) aliph. or arom. hydrocarbyl], useful in pharmaceuticals, photosensitizers in electrophotog. 143454-52-8 is also in the experiment., liq. crystals, and org. elec. conductors (no data), are prepd. by photoredn. of diazo compds. II. A soln. of II (R1 = R3 = CO2Et) in C6H6 was irradiated with 100 W Hg lamp under cooling to give 82% I (R1 = R3 = CO2Et, R2 = Ph). .

Thermal rearrangements of aromatic compounds, part 8

Thermal rearrangements of aromatic compounds, part 8. Azulene-to-naphthalene rearrangement. A comment on the kinetics. Scott, Lawrence T. (Dep. Chem., Univ. Nevada, Reno, NV 89557, USA). J. Org. Chem., 49(16), 3021-2 (English) 1984. CODEN: JOCEAH. ISSN: 0022-3263. 90270-09-0 is also in the experiment. DOCUMENT TYPE: Journal CA Section: 22 (Physical Organic Chemistry) The first order kinetics reported for thermal rearrangement of azulene to naphthalene in the gas phase are compatible not only with a monomol. mechanism, but also with a radical chain mechanism initiated by bimol. coupling of two azulene mols. to give the biazulyl diradical I and the biazulene II. Thus, the possible intermediacy of the azulenyl radical III, cannot be ruled out by the kinetic data available for this unusual interconversion of arom. hydrocarbons. .