Asymmetric total synthesis of (+)-epiepoformin was achieved in short steps using the base-catalyzed asymmetric Diels–Alder (DA) reaction of 3-hydroxy-2-pyrone with chiral acrylate. Since the synthesis produced Ogasawara's intermediate, it is also presented as a formal synthesis of (−)-theobroxide.
使用碱催化的
3-羟基-2-吡喃酮与手性
丙烯酸酯的碱催化不对称Diels-Alder(
DA)反应可在短时间内完成(+)-表
二甲双胍的不对称全合成。由于该合成产生了Ogasawara的中间体,因此它也以(-)-可可氧化物的形式合成形式存在。