Three-Component Coupling Approach to Trachyspic Acid
摘要:
Three-component coupling of the lithium enolate of t-BuOAc, silyl glyoxylate, and an alpha,beta-unsaturated ketone enables the rapid construction of the trachyspic acid carbon skeleton. A 3,4-disubstituted isoxazole is utilized to mask the C7/C9 dicarbonyl. New enolsilane/nitrile-oxide cycloadditions enable the preparation of various 3,4-disubstituted isoxazoles that are challenging to access by other means.
Three-Component Coupling Approach to Trachyspic Acid
作者:Daniel C. Schmitt、Leighann Lam、Jeffrey S. Johnson
DOI:10.1021/ol202002r
日期:2011.10.7
Three-component coupling of the lithium enolate of t-BuOAc, silyl glyoxylate, and an alpha,beta-unsaturated ketone enables the rapid construction of the trachyspic acid carbon skeleton. A 3,4-disubstituted isoxazole is utilized to mask the C7/C9 dicarbonyl. New enolsilane/nitrile-oxide cycloadditions enable the preparation of various 3,4-disubstituted isoxazoles that are challenging to access by other means.