Acetylenedicarbaldehyde: isolation and some examples of exclusive dienophilicity under neutral conditions
作者:Dominique Stéphan、Alain Gorgues、Ahmed Belyasmine、André Le Coq
DOI:10.1039/c39880000263
日期:——
Acetylenedicarbaldehyde (1) is isolated in the pure state after acidolysis of its monoacetal (2) with an excess of formic acid followed by dehydration of residual HCO2H into CO with P2O5; under neutral conditions, (1) reacts with conjugated dienes as a dienophile only, in contrast to what occurs in acidic medium.
在用过量的甲酸酸解其单缩醛(2),然后用P 2 O 5将残留的HCO 2 H脱水成CO时,分离出纯的乙炔二甲醛(1); 在中性条件下,(1)与共轭二烯仅作为亲二烯体反应,这与酸性介质中的反应相反。