Synthesis of 3,4,5-Trisubstituted Isoxazoles via Sequential [3 + 2] Cycloaddition/Silicon-Based Cross-Coupling Reactions
作者:Scott E. Denmark、Jeffrey M. Kallemeyn
DOI:10.1021/jo047755z
日期:2005.4.1
A [3 + 2] cycloaddition reaction between alkynyldimethylsilyl ethers and arlyl and alkyl nitrile oxides to produce isoxazolylsilanols has been developed. The cross-coupling reactions of these heterocyclic silanols with a variety of aryl iodides affords 3,4,5 -trisubstituted isoxazoles. This sequential process allows for rapid variation of substituents at the 3 4, and 5 positions of the isoxazole.