Detail of "697-91-6"

Reference

The structure and heat resistance aromatic polyaminoquinones

The structure and heat resistance aromatic polyaminoquinones. Sato, Yoshikazu; Musya, Yoshihiko; Amemiya, Yasuhiro; Katayama, Masamichi (Sch. Eng., Nihon Univ., Tokyo, Japan). Nihon Daigaku Kogakubu Kiyo, Bunrui A, 16, 113-24 (Japanese) 1975. CODEN: NDKADF. DOCUMENT TYPE: Journal CA Section: 35 (Synthetic High Polymers) 2,5-Dichloro-p-benzoquinone (I) [615-93-0], 2,6-dichloro-p-benzoquinone (II) [697-91-6], or chloranil (III) [118-75-2] is polymd. with 1,4-phenylenediamine at -15 or -50° to give arom. polyaminoquinones.Several reagents such as 615-93-0 is used here. The structure of the polymer was confirmed by comparing the IR and Raman spectra of the polymer with those of model compds. of reaction products of I, II, or III with aniline [62-53-3]. The inherent viscosities of the above polymers were 0.1-0.29 (30°, 0.3 g/dL MeSO3H). .

The synthesis of a degradation product of phomazarine: a regiospecific elaboration of the B and C rings of the pigment

The synthesis of a degradation product of phomazarine: a regiospecific elaboration of the B and C rings of the pigment. Guay, Vincent; Brassard, Paul (Dep. Chim., Univ. Laval, Quebec, PQ G1K 7P4, Can.). Synthesis, (3), 294-7 (English) 1987. CODEN: SYNTBF. ISSN: 0039-7881. 107812-48-6 and 10088-99-0 are cas registry numbers of chemicals which are used as reagents here. DOCUMENT TYPE: Journal CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) 7-Butyl-3,5-dihydroxy-6-methoxynaphthoquinone (I) [107812-47-5], an oxidative degrdn. product of phomazarine [10088-99-0], was synthesized starting from 2-hexanone [591-78-6]. The key step in the synthesis was the formation of 3-butyl-1,2-dimethoxy-1-(trimethylsilyloxy)-1,3-butadiene (II) [107812-48-6] from Me 2-methoxy-3-methyl-2-heptenoate [107812-49-7] or Me 2-methoxy-3-methyleneheptanoate [107828-62-6]. II was cyclocondensed with 2,6-dichlorobenzoquinone [697-91-6] to give 7-butyl-3-chloro-5-hydroxy-6-methoxynaphthoquinone [107812-50-0], which upon refluxing in ethanolic aq. NaOH gave I. .