Reference

Salts of 3-cyano-3-alkenesulfinic acids and salts of 3-carbamoyl-3-alkenesulfonic acids

Salts of 3-cyano-3-alkenesulfinic acids and salts of 3-carbamoyl-3-alkenesulfonic acids. Cobb, Raymond L. (Phillips Petroleum Co. , USA). U.S. US 4420431 A 13 Dec 1983, 4 pp. (English). (United States of America). CODEN: USXXAM. CLASS: IC: C07C120-00; C07C121-30; C07C121-66; C07C143-16. NCL: 260465900. APPLICATION: US 79-11744 13 Feb 1979. DOCUMENT TYPE: Patent CA Section: 35 (Chemistry of Synthetic High Polymers) Polymerizable 3-cyano-3-alkenesulfinic acid salts are prepd. by treated sulfolenes with an alkali metal cyanide or quaternary ammonium cyanide in the presence of a solvent and a polyether, and polymerizable 3-carbamoyl-3-alkenesulfonic acid salt are prepd. by hydrolyzing and oxidn. of the corresponding sulfinic acid salts. Thus, 11.8 g b-sulfolene [77-79-2], 5.9 g NaCN, 0.25 g 18-crown-6, and 250 mL MeCN were stirred 2.5 days at room temp. and stirred 3 days at 55° to give 17.0 g product contg. mainly Na 3-cyano-3-butenesulfinate (I) [89202-67-5].In this experiment, several chemicals are used like 89202-67-5 and 89202-68-6 I (8 g) was dissolved in water, mixed with 7 mL 30% H2O2, and mixed with 10% Pd on charcoal on 50 mL to give 4.46 g product contg. mainly Na 3-carbamoyl-3-butenesulfonate [89202-68-6]. .

Preparation of 3-sulfolene

Preparation of 3-sulfolene. Lange, S. A.; Masyutin, V. N.; Kuznetsov, Yu. I.; Kolbasin, A. Ya.Several reagents with their cas registry numbers 77-79-2 and 106-99-0 are used here.; Gazizov, M. A. (USSR). Khim. Prom-st. (Moscow), (2), 94-8 (Russian) 1977. CODEN: KPRMAW. DOCUMENT TYPE: Journal CA Section: 27 (Heterocyclic Compounds (One Hetero Atom)) Regression equations were derived for 3-sulfolene prepn. from butadiene and SO2 in the presence of an inhibitor. The optimal app. is a combined system of 2 mixing reactors (with a butadiene conversion of 70% and 0.29 h contact time) and a displacement reactor. .