Rearrangement of Cyclobutenones to 2,5- and 2,6-Dialkylated 1,4-Benzoquinones. Synthesis of O-Methylperezone and O-Methylisoperezone

Article abstract of DOI:10.1021/jo00270a004

2,5-Dialkylated benzoquinones have been prepared from 4-alkenyl-4-hydroxycyclobutenones by thermolysis followed by oxidation, while 2,6-dialkylated benzoquinones are available by thermolysis of 4-alkynyl-4-hydroxycyclobutenones.The complementarity of thes