of plant, fungal, and bacterial origin. In this paper an improved method for the chemical synthesis of differently substituted chromanes is described. Substituted 2H-1-benzopyrans have been synthesized in good to excellent yields (52–81%) by treatment of 3,3-dimethylallyl and propenylbenzene ethers of differently substituted phenols with phenylselenyl chloride.
苯并二氢吡喃核心在自然界中广泛存在,是植物,真菌和细菌来源的许多次级代谢产物的一部分。在本文中,描述了一种化学合成不同取代的苯并二氢吡喃的改良方法。通过用苯基硒烯基氯处理不同取代的苯酚的3,3-二甲基烯丙基和丙烯基苯醚,可以很好地合成优良的产率(52-81%)的2 H -1-苯并吡喃。