New syntheses of haloketo acid methyl esters and their transformation to halolactones by reductive cyclization
作者:H. China、H. Yatabe、N. Kageyama、M. Fujitake、K. Kikushima、T. Dohi
DOI:10.1007/s11172-020-2965-6
日期:2020.9
method for haloketo acid methyl ester synthesis on the basis of the ring-opening of cyclic α,β-unsaturated ketones followed by halogenation under mild conditions is reported. Di- and tri-haloketo acid methyl esters are conveniently synthesized via the hydrolytic ring-opening reaction through this method. Halolactones were readily obtained from these haloketo acid methyl esters by reductive cyclization employing
报道了一种基于环状α,β-不饱和酮开环然后在温和条件下卤化合成卤代酮酸甲酯的新方法。通过该方法通过水解开环反应方便地合成二-和三-卤代酮酸甲酯。通过使用 NaBH4 和三氟乙酸的还原环化反应,很容易从这些卤代酮酸甲酯中获得卤代内酯。还证明了使用外卤代亚甲基部分衍生化获得的卤内酯。