treated with boron trifluoride diethyl etherate to generate β‐iodoallenolates, which underwent intramolecular aldol reactions to produce cycloalkenyl alcohols. Diastereoselective oxa‐Michael ring closure could then be induced by treatment with a catalytic amount of gold(III) chloride, affording highly functionalized tetrahydropyranone‐containing ring systems.
炔酮用
三氟化硼乙醚化物处理生成 β-
碘代烯醇酸酯,然后进行分子内醛醇反应生成环烯基醇。然后可以通过用催化量的
氯化金(III)处理来诱导非对映选择性 oxa-Michael 闭环,提供高度官能化的含
四氢吡喃酮的环系统。