1: (4-methoxyphenyl)methanol With manganese(IV) oxide in chloroform 2 h; Reflux; 2: 1-(4-nitrobenzyl)-tetrahydrothiophenium bromide With 1,3,4,6,7,8-hexahydro-2H-pyrimido[1,2-a]pyrimidine in chloroform Corey-Tschaikosky Epoxidation; 0.333333 h;