A Modified Mannich Reaction Using 1.3-Dioxolane.
作者:Kazuharu SUMITA、Masayuki KOUMORI、Sachio OHNO
DOI:10.1248/cpb.42.1676
日期:——
Mannich reaction of ketones using 1, 3-dioxolane instead of formaldehyde, paraformaldehyde, or 1, 3, 5-trioxane afforded the corresponding Mannich bases in high yields. Under the same conditions the aminomethylation of aromatics did not proceed but the intramolecular aminomethylation, like a Pictet-Spengler type reaction, proceeded smoothly.
使用1,3-二恶烷代替甲醛、三聚甲醛或1,3,5-三恶烷进行的酮的Mannich反应,以高产率得到了相应的Mannich碱。在同样的条件下,芳香族的胺甲基化反应并未进行,但类似于Pictet-Spengler类型的分子内胺甲基化反应却顺利进行。