反应详情

The process of Example 1 was carried out except that the aldehyde was 2-(2,2,3-trimethylcyclopent-3-en-yl) ethaldehyde and the furanone did not contain a 5-methyl group to obtain (E)-3-[2-(2,2,3-trimethylcyclopent-3-en-yl)ethenyl]dihydro-2 (3H)-furanone. 1HNMR (CDCl3) [Redistilled E isomer] δ6.80 (m, 1H), 5.24 (close spaced m, 1H), 4.40 (t, 2H), 2.93 (m, 2H), 2.45-1.77 (m, 6H), 1.62 (close spaced m, 3H), 1.04 (s, 3H), 0.85 (s, 3H). BP 1.38°-156 ° C. at 0.20 mm Hg Yield 42-57%