作者:Seung-Bo Shim、Yoon-Joo Ko、Byeong-Wook Yoo、Chang-Keun Lim、Jung-Hyu Shin
DOI:10.1021/jo048867t
日期:2004.11.1
The intramolecular ionic Diels−Alder reaction of α-acetylenic acetals as a precursor of the propargyl cation has been investigated in the presence of Lewis acids and in protic acids. The reaction of diene-tethered α-acetylenic acetals (1−2) with formic acid yielded the regioselective intramolecular ionic Diels−Alder reaction products, bicyclodienal (9) and bicyclodienone (11) derivatives, in good yields
已经研究了在路易斯酸和质子酸存在下作为炔丙基阳离子前体的α-炔醛缩醛的分子内离子Diels-Alder反应。二烯-拴系的α-炔缩醛(反应1 - 2)与甲酸,得到的分子内区域选择性离子Diels-Alder反应产物,bicyclodienal(9)和bicyclodienone(11)的衍生物,以良好产率。