A catalytic amount of ruthenium(III) acetylacetonate (2 mol%) [Ru(acac)3] enables solvent-free tetrahydropyranylation of different types of alcohols and phenols at ambient temperature in moderate to excellent yields. Notably, selective monoprotection of diols can be achieved chemoselectively. Furthermore, the catalyst could be recovered and reused if necessary.Key words: tetrahydropyranyl ethers, protecting groups, ruthenium(III) acetylacetonate, alcohols, thiols.
在乙酰丙酮酸钌(III)(2 mol%)[Ru(acac)3]的催化下,可在常温下无溶剂地对不同类型的醇类和酚类进行四氢吡喃化反应,产率从中等到极佳。值得注意的是,二元醇可以化学选择性地实现选择性单保护。关键词:四氢吡喃基醚、保护基团、乙酰丙酮酸钌(III)、醇、硫醇。