Reference

Environmentally friendly preparation of 4,5-di(ester-substituted) imidazoles

Environmentally friendly preparation of 4,5-di(ester-substituted) imidazoles. Uedaira, Shigeo; Ito, Takayuki; Shimada, Yasuhiro (Fuji Photo Film Co., Ltd., Japan).In this article, certain chemicals are used. One of their cas registry numbers is 1080-79-1 Jpn. Kokai Tokkyo Koho JP 2004099544 A2 2 Apr 2004, 10 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: ICM: C07D233-90. APPLICATION: JP 2002-264728 10 Sep 2002. DOCUMENT TYPE: Patent CA Section: 28 (Heterocyclic Compounds (More Than One Hetero Atom)) The imidazoles I [R1, R2 = (cyclo)alkyl, [(bi)cyclo]alkenyl, alkynyl, aryl, heterocyclic group] are prepd. from OHCHN(R1O2C)C:C(CO2R2)NHCHO (II; R1, R2 = same as above). Thus, II (R1 = R2 = Me) was refluxed in the presence of AcOH in PhMe to give I (R1 = R2 = Me). .

Preparation of 4,5-dialkoxycarbonylimidazoles

Preparation of 4,5-dialkoxycarbonylimidazoles. Kaneko, Yuji; Motoki, Masushi (Fuji Photo Film Co., Ltd., Japan). 1080-79-1 is the cas registry number. This chemical is also mentioned in this article. Jpn. Kokai Tokkyo Koho JP 2004123544 A2 22 Apr 2004, 13 pp. (Japanese).In this article, certain chemicals are used. One of their cas registry numbers is 1080-79-1 (Japan). CODEN: JKXXAF. CLASS: ICM: C07D233-90. APPLICATION: JP 2002-285456 30 Sep 2002. DOCUMENT TYPE: Patent CA Section: 28 (Heterocyclic Compounds (More Than One Hetero Atom)) Title compds. I [R1, R2 = (cyclo)alkyl, alkenyl, alkynyl, aryl] are prepd. by reaction of R1O2CC(OH):C(OH)CO2R2 (II; R1, R2 = same as I) with HCO2H and ammonium salts or HCONH2. (E)-II (R1 = R2 = Me) was treated with ammonium formate and HCO2H at 80° for 2 h to give 44% I (R1 = R2 = Me). ..