作者:Tetsuo Miyakoshi、Hiroyasu Togashi
DOI:10.1055/s-1990-26889
日期:——
The intramolecular cyclization of 2-alkanoyl-2,5-dimethoxytetrahydrofurans 4 with aqueous acid is described. 3-Alkylcatechols 7 were prepared in generally good yields by boiling the dioxane solution of compounds 4 in the presence of 1M hydrochloric acid. In addition, 4,5-dioxoalkanals 6 were obtained in good to high yields when the dioxane solution of compounds 4 was treated with 0.1 M hydrochloric acid.
描述了2-烷酰基-2,5-二甲氧基四氢呋喃4与水性酸的分子内环化反应。通过在1M盐酸存在下煮沸化合物4的二恶烷溶液,通常能够获得3-烷基儿茶酚7,产率良好。此外,当化合物4的二恶烷溶液用0.1 M盐酸处理时,还能获得良到高产率的4,5-二氧代烷醛6。