| Abstrakt: |
The reduction of 2,5-dimethoxytetrahydrofurans, 2,5-dimethoxydihydrofurans, 2,6-dialkoxytetrahydropyrans, and 2,6-dialkoxydihydropyrans with mixtures of LiAlH4 and AlCl3 with various component ratios (3:1, 1:1, and 1:3) proceeds with ring opening and the formation of aliphatic ?-alkoxy alcohols. Hydrogenolysis of 2,5-dimethoxy-2,5-dihydrofuran and 2,6-dialkoxy-?3-dihydropyrans is accompanied by a partial reduction of the double bond and the formation of unsaturated alkoxy alcohols and their saturated analogs. A possible mechanism for the hydrogenolysis is discussed. |
Full text from SpringerLink