from (−)‐β‐pinene were synthesized and found to be highly efficient precatalysts for the enantioselective intramolecular Stetter reaction. The triazolium salts prepared from a single precursor, (−)‐β‐pinene, react with antipodal enantiofacial selectivity in the Stetter reaction to afford mono‐, di‐, and trisubstituted chromanones in excellent yields with excellent stereoselectivity.
合成了一系列从(-)-β-pine烯衍生的新型手性三唑鎓盐,发现它们是对映选择性分子内Stetter反应的高效预催化剂。由单一前体(-)-β-pine烯制得的三唑鎓盐在Stetter反应中与对映体对面的脸部选择性反应,以优异的收率和优异的立体选择性提供单,二和三取代的苯并二氢
呋喃酮。