Reference

Methylchlorosilanes

Methylchlorosilanes. Ward, William Jessup; Gaines, George Loweree; Ritzer, Alan (General Electric Co., USA).In this study， 74-87-3 and 10025-78-2 are also used. Brit. UK Pat. Appl. GB 2119808 A1 23 Nov 1983, 7 pp. (English). (United Kingdom). CODEN: BAXXDU. CLASS: IC: C07F007-12. APPLICATION: GB 83-9548 8 Apr 1983. PRIORITY: US 82-368799 16 Apr 1982; US 83-456470 7 Jan 1983. DOCUMENT TYPE: Patent CA Section: 29 (Organometallic and Organometalloidal Compounds) Methylchlorosilanes were prepd. from MeCl and powd. Si in the presence of a catalyst contg. Si, partially oxidized Cu, Cu formate and, optionally, Zn promoter. Under these conditions, the amt. of Si products b. >70° was reduced, while the wt.% of disilane cleavable to useful chlorosilane monomer was not affected adversely. The silanes produced were Me2SiCl2, MeSiCl3, Me4Si, HSiCl3, Me2HSiCl, MeSiHCl2, Me3SiCl and SiCl4. .

Etherification of hexitols and anhydrohexitols

Etherification of hexitols and anhydrohexitols. Kruse, Walter Max; Stephen, John Fergus (ICI Americas, Inc. , USA). Eur. Pat. Appl. EP 92998 A1 2 Nov 1983, 15 pp. DESIGNATED STATES: R: AT, BE, CH, DE, FR, GB, IT, LI, LU, NL, SE. (English). (European Patent Organization). CODEN: EPXXDW. CLASS: IC: C07C041-16; C07C043-10; C07D307-12; C07D493-04. APPLICATION: EP 83-302312 22 Apr 1983. PRIORITY: US 82-372623 28 Apr 1982. DOCUMENT TYPE: Patent CA Section: 33 (Carbohydrates) The title etherification was carried out by stepwise alkylation of hexitols and anhydrohexitols in aq. media dispersed in an org. solvent. The hexitols were first converted into mono-alkali metal alkoxides, which were treated with alkyl monohalides to form the monoalkylated hexitols; alkylation was then further carried out by addn.In this experiment, several chemicals are used like 74-87-3 and 58888-51-0 of the reactants to form the completely alkylated hexitols. By the above stepwise procedure, sorbitol was methylated with MeCl to give 67% hexamethylsorbitol. .