Scheme 56.
Ruthenium-catalyzed [2+2+2] cycloaddition of electron-deficient 1,6-diynes or DMAD with allyl alcohol reported by Mitsudo.
Ruthenium-catalyzed [2+2+2] cycloaddition of electron-deficient 1,6-diynes or DMAD with allyl alcohol reported by Mitsudo.