School of Chemistry, Bharathidasan University, Tiruchirappalli-620 024, Tamil Nadu, India.
Org Biomol Chem. 2013 Apr 7;11(13):2162-7. doi: 10.1039/c3ob26284g.
In the presence of indium triflate, o-alkynylbenzaldehydes form isochromenylium cations that react with enones such as chalcones and diarylidineacetones to give 1,2-dihydronaphthalenes in moderate to good yields. The reaction proceeds via a rare type of Diels-Alder reaction in which both the diene (isochromenylium cation) and the dienophile (enone) are electron deficient.
在三氟甲磺酸铟的存在下，邻炔基苯甲醛形成异苯并呋喃鎓阳离子，该阳离子与如查耳酮和二芳基乙烯酮等烯酮反应，以中等至良好的收率得到 1,2-二氢萘。该反应通过一种罕见的 Diels-Alder 反应进行，其中双烯（异苯并呋喃鎓阳离子）和亲二烯体（烯酮）都是缺电子的。
