Reference

2-Alkoxyphenols by monodealkylation of 1,2-dialkoxybenzenes

2-Alkoxyphenols by monodealkylation of 1,2-dialkoxybenzenes. Cerveny, Libor; Marhoul, Antonin; Ruzicka, Vlastimil; Strohalm, Jiri; Hora, Alois (Czech. ). Czech. CS 164637 15 Sep 1976,3 pp.Chemicals with cas numbers 94-71-3 and 2050-46-6 also play role. (Unavailable). (Czechoslovakia). CODEN: CZXXA9. CLASS: IC: C07C039-00. APPLICATION: CS 73-6777 2 Oct 1973. DOCUMENT TYPE: Patent CA Section: 25 (Noncondensed Aromatic Compounds) The cleavage of 1,2-(EtO)2C6H4 (I) over aluminosilicate catalysts in the presence of steam (to inactivate the catalyst) decreased the amt. of higher-boiling compds. in the product. Thus, I was dealkylated with aluminosilicate catalyst at 240.degree. and H2O:I molar ratio 10.6:1 to give a product contg. 46.5% unreacted I, 45% 2-EtOC6H4OH, 2.3% pyrocatechol, and 6.2% higher-alkylated by-products. .

Preparation of benzene(thio)carboxamides in nonhalogenated hydrocarbon solvents

Preparation of benzene(thio)carboxamides in nonhalogenated hydrocarbon solvents. Igarashi, Yasuto; Oguro, Kiyoto; Mitsui, Osamu; Aki, Shinji; Ishigami, Shoji (Toyo Kasei Kogyo Co., Ltd.; Ohtsuka Pharmaceutical Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 2005015342 A2 20 Jan 2005, 9 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: ICM: C07C327-48. ICS: C07D317-68; C07D319-18. 2050-46-6 and 75-75-2 are cas registry numbers of chemicals which are used as reagents here. APPLICATION: JP 2003-177770 23 Jun 2003. DOCUMENT TYPE: Patent CA Section: 25 (Benzene, Its Derivatives, and Condensed Benzenoid Compounds) Title compds. I [R = C(:X)NH2; X = S, O; R1, R2 = H, lower alkoxy; R1R2 may form lower alkylenedioxy] are prepd. by treatment of I (R = H; R1, R2 = same as above) with MXCN (M = alkali metal; X = same as above) in the presence of sulfonic acids and nonhalogenated hydrocarbon solvents. Thus, 1,2-diethoxybenzene was treated with K rhodanide and MeSO3H at 25° for 4 h in n-hexane and hydrolyzed to give 65.3% 3,4-diethoxythiobenzamide with 99.87% purity. .