Reaction of 1,3-bis(dimethylamino)trimethinium perchlorate (1) with 3-substituted prop-2-ynals (4) in acetic anhydride at the presence of ZnBr2 gives upon hydrolysis 1-substituted 2,4,6-triformylbenzenes (6) in low to moderate yield. This reaction is restricted to prop-2-ynals bearing electron rich aromatic substituents at the 3-position.
1,3-双(二
甲基氨基)三甲
硫铵高氯酸盐(1)在
乙酸酐中与3-取代的丙-2-炔醛(4)在ZnBr2存在下反应,
水解后得到低至中等产率的1-取代的
2,4,6-三
甲醛苯(6)。这种反应仅限于3-位置带有富电子芳香基团的丙-2-炔醛。