作者:Yu. N. Polivin、B. I. Ugrak、T. S. Sheveleva、R. A. Karakhanov
DOI:10.1007/bf00866600
日期:1992.6
The reaction of RS(SR)-2,3-dibromo- and 2,3-dichlorotetrahydrofurans with ethylmagnesium bromide in ether was investigated. It was shown that the main reaction products are 2-ethyl-3-bromotetrahydrofuran (27%) and 3-bromo-2-(2-ethyl-3-tetrahydrofuryl)tetrahydrofuran (65%) in the first case and 2-ethyl-3-chlorotetrahydrofuran (33%) and 3-chloro-2-(3-chloro-2-tetrahydrofuryl)tetrahydrofuran (65%) in the second.
346. Stereochemical studies of olefinic compounds. Part II. Ring scission of 2–1′-halogenoalkyltetrahydrofurans and 3-halogeno-2-alkyl-tetrahydropyrans as a route to alk-4-en-1-ols of known configuration and as a method of chain extension by five methylene groups