The Reaction of Tropolones with Phosphorus Oxychloride. The Rearrangement Reaction of 5-Arylazo-2-chlorotropones to 2-Aryl-4, 5-dichloroindazoles
作者:Katsuo Kikuchi、Masaki Yagi、Kunio Takada
DOI:10.1246/bcsj.41.424
日期:1968.2
The reaction of tropolone and phosphorus oxychloride gave 2-chlorotropone. Similarly, 5-cyano-, 5-nitro, and 5-chlorotropolones afforded the corresponding 2-chlorotropone derivatives in moderate yields. 3-Cyanotropolone gave 2-chloro-7-cyanotropone, while 3-phenyltropolone afforded only 2-chloro-3-phenylbenzaldehyde. When 3-bromotropolone and 5-bromotropolone were treated similarly, 2, 7-dichloro- and 2, 5-dichlorotropones were obtained respectively, with a facile halogen exchange. The further treatment of 2, 5-dichlorotropone with phosphorus oxychloride afforded 2, 5-dichloro- and 3,4-dichlorobenzaldehydes. The reaction of 5-p-tolylazo-, 5-phenylazo-, and 5-p-nitrophenylazotropolones with phosphorus oxychloride gave the corresponding 5-arylazo-2-chlorotropones, which, on further treatment with an excess of the reagent, gave 2-aryl-4, 5-dichloroindazoles.
The Rearrangement of Tropones to Dihydrobenzene Derivatives
作者:Katsuo Kikuchi
DOI:10.1246/bcsj.40.355
日期:1967.2
The positions of the double bonds in 1-phenylcyclohexadiene-1,2-dicarboxylic acid, which had been obtained previously by the alkaline rearrangement of 2-phenyltropone-7-carboxylic acid, were elucidated from the spectral data. A similar rearrangement of tropone derivatives to dihydrobenzene derivatives was also observed. Tropone-2-carboxylic acid gave 2,5-cyclohexadiene-1,2-dicarboxylic acid, while 2-phenyltropone-5-carboxylic acid afforded 1-phenyl-2,4-cyclohexadiene-1,4-dicarboxylic acid. 2-Phenyltropone was also rearranged by alkali to 2-phenyl-2,5-cyclohexadiene-1-carboxylic acid.
Liquid Crystals with a 5-Cyanotropone Skeleton: 2-(4-Alkoxybenzoyloxy)-5-cyanotropone and 2-(4-Alkoxybenzoylamino)-5-cyanotropones
作者:Masashi Hashimoto、Seiji Ujiie、Akira Mori
DOI:10.1246/cl.2000.758
日期:2000.7
New troponoid liquid crystals with an electron-withdrawing cyano group at the C-5 position of tropolone and 2-aminotropone rings were prepared. Tropolone derivatives had nematic phases with lower thermal stabilities and smectic A phases with higher thermal stabilities than the corresponding benzenoids while thermal stabilities of the aminotropone derivatives were better than those of the benzenoids
制备了在托酚酮的 C-5 位具有吸电子氰基的新型 troponoid 液晶和 2-aminotropone 环。托酚酮衍生物的向列相具有较低的热稳定性和近晶相 A 相的热稳定性高于相应的苯类化合物,而氨基托酮衍生物的热稳定性优于苯类化合物的热稳定性。X 射线衍射研究表明,在近晶 A 相中测得的层间距与计算的分子长度之比对于托酚酮衍生物为 1.3,对于氨基托酚酮衍生物为 1.45。他们形成了交叉的双层。
PHOTOBASE GENERATOR AND PHOTOCURABLE RESIN COMPOSITION
申请人:Asahi Kasei Chemicals Corporation
公开号:EP2093269A1
公开(公告)日:2009-08-26
Disclosed is a photobase generator comprising a compound having a nitrogen atom and a conjugated multiple bond.