3-Substituted phthalides were synthesized for the first time by crossed alkyne cyclotrimerisations with Wilkinson’s catalyst. Esterification of propiolic acids with chiral propargylic alcohols by either the DCC/DMAP or the Mitsunobu method allows the synthesis of either enantiomeric form of diyne esters, that are used in crossed alkyne cyclotrimerisations with acetylene to provide 3-substituted phthalides in both enantiomeric forms.
首次通过与威尔
金森催化剂的交叉
炔烃环三聚反应合成了3-取代的
邻苯二甲酸内酯。用
DCC/
DMAP或
三苯基膦的方法对
丙炔酸与手性炔
丙醇进行酯化,可以合成任一对映体形式的二烯酯,这些二烯酯被用于与
乙炔的交叉
炔烃环三聚反应,从而得到两种对映体形式的3-取代
邻苯二甲酸内酯。