An approach to lankacidin synthesis: control of stereochemistry using Δ2-isoxazolines
作者:M.J. Fray、E.J. Thomas
DOI:10.1016/s0040-4020(01)91095-6
日期:1984.1
sequential addition of methyl chlorofonmate and methyl iodide. The reduction of these substituted isoxazolines was then investigated. -Methylation using Meerwein's salt, and reduction of the derived -methylisoxazolinium salt using sodiumborohydride gave isoxazolidines (14) and (20), but only in modest yields. The analogous -methylation -reduction of the lactone-isoxazoline (12) was not stereoselective