The Baeyer–Villiger oxidation represents a valuable reaction that enables the conversion of ketones into esters or lactones. Here, we present a novel and efficientapproach utilizing I2 as a catalyst for the oxidative rearrangement of cyclobutenones, resulting in the synthesis of furan-2(5H)-one. Notably, this method employs dimethyl sulfoxide (DMSO) as a greener oxidant and source of oxygen. The reaction
拜尔-维利格氧化是一种有价值的反应,可以将酮转化为酯或内酯。在这里,我们提出了一种新颖且有效的方法,利用 I 2作为环丁烯酮氧化重排的催化剂,从而合成呋喃-2(5 H )-酮。值得注意的是,该方法采用二甲亚砜 (DMSO) 作为更环保的氧化剂和氧源。在催化量的碘的作用下,反应顺利进行,以良好的产率产生内酯。与依赖过酸或过氧化氢的传统拜尔-维利格氧化反应相比,DMSO 的使用提供了更安全、更通用的替代方案。
YAMAMOTO K.; TANAKA A., J. HETEROCYCL. CHEM., 1979, 16, NO 6, 1293-1294
作者:YAMAMOTO K.、 TANAKA A.
DOI:——
日期:——
Heteroatom-Guided Torquoselective Olefination of α-Oxy and α-Amino Ketones via Ynolates
Ynolates were found to react with alpha-alkoxy-, alpha-siloxy-, and alpha-aryloxyketones at room temperature to afford tetrasubstituted olefins with high Z selectivity. Since the geometrical selectivity was determined in the ring opening of the beta-lactone enolate intermediates, the torquoselectivity was controlled by the ethereal oxygen atoms. From experimental and theoretical studies, the high Z