A facile one-pot synthetic method of building aryloxyalkyl esters was developed using various types of phenolic esters with halogenated alcohols. The ready availability of both starting materials, coupled with the required simple experimental technique, enables the current synthetic method of producing aryloxyalkyl esters in a fast and efficient way. It is noteworthy that acyl transfer was demonstrated
The reaction of 1- or 2-naphthol with allylic halides (1-chloro-3-methyl-2-butene, 1-chloro-3,7-dimethyl-2,6-octadiene, trans-1-chloro-2-butene and trans-1-chloro-2-hexene) in the presence of metallic sodium gave naphthols having the corresponding allylic group selectively.
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。
Bismuth(III) Triflate-Catalyzed Intermolecular Cyclization of Phenols with Diols: Direct Access to O-Heterocycles
作者:Maki Minakawa、Yuya Sakurai
DOI:10.1055/a-1770-7922
日期:2022.4
A direct access to O-heterocycles by Bi(OTf)3-catalyzed intermolecular cyclization of phenols with diols is described. Catalytic dehydrative tandem formation of C–O and C–C bonds was achieved by using a Bi(OTf)3 catalyst without any additives. The catalytic intermolecular cyclization of phenols with various diols proceeded to give the corresponding chromanes in up to 91% yield and/or pyran derivatives