Cycloaddition reactions of acyl ketenes with enol ethers: A general synthesis of 2-alkoxy-2,3-dihydro-4h-pyran-4-ones.
作者:Robert S. Coleman、Eugene B. Grant
DOI:10.1016/s0040-4039(00)97442-2
日期:——
A detailed description of the hetero Diels-Alder reactions of acyl ketenes 4-6 with electron-rich dienophiles 7-9 for the facile synthesis of 2-alkoxy-2,3-dihydro-4H-pyran-4-ones 10-12 is presented.