We have synthesized various types of acetals using 3-methyl-3-butenal and 2-alkenyl, furfuryl, benzyl, p-substituted benzyl, and 2-pentynyl alcohols. These acetals have given corresponding aldehydes after an acid catalytic reaction. Trifluoroacetic acid (CF3COOH) was the best catalyst. The best yield attained was 79% when 3-methyl-3-butenal di(trans-2-pentenyl) acetal was used as a substrate. We also demonstrated that this reaction proceeded via a Claisen–Cope rearrangement.
我们使用 3-甲基-
3-丁烯醛和 2-烯基醇、
糠醇、
苄醇、对位取代的
苄醇和
2-戊炔醇合成了各种类型的
缩醛。这些
缩醛在酸催化反应后得到相应的醛。
三氟乙酸(CF3COOH)是最好的催化剂。当使用3-甲基-
3-丁烯醛二(反式-
2-戊烯基)
缩醛作为底物时,获得的最佳收率为79%。我们还证明了该反应是通过克莱森-科普重排进行的。