1,5-Heptadien-4-ol and various 1,4- and 1,5-glycols are catalytically converted to open-chain and cyclic ethers respectively in the presence of butyltin trichloride. The dehydration of alcohols is mediated by formation of organoalkoxytin dihalides BuSn(OR)Cl2 A mechanism for the formation of these ethers is proposed. The catalytic activity of other organotins together with SnCl4 has been examined for the conversion of 1,5-pentanediol to THP; the scale of the catalytic efficiency is: MeSnCl3⩾PhSnCl3SnCl4BuSnCl3Me2SnCl2Bu2SnCl2≫ [Bu2SnCl]2O.
ORGANOTINS AS ETHERIFICATION CATALYSTS .2. CATALYTIC CONVERSION OF ALCOHOLS TO OPEN-CHAIN AND CYCLIC ETHERS BY ORGANOTIN TRICHLORIDES
TAGLIAVINI, GIUSEPPE;MARTON, DANIELE;
1989
Abstract
1,5-Heptadien-4-ol and various 1,4- and 1,5-glycols are catalytically converted to open-chain and cyclic ethers respectively in the presence of butyltin trichloride. The dehydration of alcohols is mediated by formation of organoalkoxytin dihalides BuSn(OR)Cl2 A mechanism for the formation of these ethers is proposed. The catalytic activity of other organotins together with SnCl4 has been examined for the conversion of 1,5-pentanediol to THP; the scale of the catalytic efficiency is: MeSnCl3⩾PhSnCl3SnCl4BuSnCl3Me2SnCl2Bu2SnCl2≫ [Bu2SnCl]2O.File in questo prodotto:
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