Detail of "3459-92-5"

Reference

Synthesis of carbonates and carbamates from dialkylazodicarboxylates

Synthesis of carbonates and carbamates from dialkylazodicarboxylates. Barneis, Zachary; Broeir, Yoav; Bittner, Shmuel (Res. Dev. Auth., Ben Gurion Univ. Negev, Beer Sheva, Israel). Chem. Ind. (London), (12), 526-7 (English) 1976. CODEN: CHINAG. DOCUMENT TYPE: Journal CA Section: 23 (Aliphatic Compounds) Dialkyl azodicarboxylates with alcs. and amines, catalyzed by EtO2CN(P+Ph3)N-CO2Et (I), gave carbonates and carbamates, resp. E. 463-77-4 and 3459-92-5 are cas registry numbers of chemicals which are used as reagents here.g., EtO2CN:NCO2Et with MeOH and I gave >75% EtO2COMe and MeO2COMe in a 1:3 ratio. I catalyzes the attack of the alc. on the carbonyl group of the dialkyl azodicarboxylate forming the intermediate, EtOO-C(O+HMe)N:NCO2Et, which eliminates N2 to give the mixed carbonate or eliminates EtOH to give the mixed diazo diester which reacts similarly to give the sym. carbonate. Similarly, aliph. amines gave carbamates and azodicarboxamides. .

Method for Lipase-Catalyzed Carbonate Synthesis via One- and Two-Step Alkoxycarbonylation Reactions

Method for Lipase-Catalyzed Carbonate Synthesis via One- and Two-Step Alkoxycarbonylation Reactions. Chandrasekaran, Sangeetha M.; Wangikar, Pramod P.There are some reagents like 3459-92-5 is used in this study. (Department of Chemical Engineering, Indian Institute of Technology, Mumbai 400 076, India). Biotechnology Progress, 19(2), 332-337 (English) 2003 American Chemical Society. CODEN: BIPRET. ISSN: 8756-7938. DOCUMENT TYPE: Journal CA Section: 7 (Enzymes) Lipase-catalyzed alkoxycarbonylation methods offer potential advantages over the currently practiced industrial scale chem. synthesis of carbonates. There are some commonly used reagents like 3459-92-5 in this article. We report a method for synthesis of org. carbonates via lipase-catalyzed alkoxycarbonylation between di-Ph carbonate and various alcs. in hexane. This method utilizes precursors that are readily available and does not involve extensive purifn. of the intermediate. In a two-step process, the two Ph groups of di-Ph carbonate were substituted by two alc. nucleophiles. The approach was demonstrated for two-step synthesis of 14 different disubstituted carbonate products. The rates of reaction for the two steps were much slower if the order of nucleophile addn. was reversed. Under optimal conditions, complete conversion of di-Ph carbonate occurred within 8-15 h at 50°, which is a significant improvement from 50-90 h at 24°. A kinetic model for the alkoxycarbonylation reaction was derived based on the Michaelis-Menten equation, which simplified to first-order kinetics at low and equimolar concn. of substrates. ..