Hexane suspensions of Me3SiCH2K or BuLi/Me3COK deprotonated 1-methylcyclohexene almost exclusively at the Me group. In contrast 1,4-dimethyl-1,2,3,6-tetrahydropyridine and 4-methyl-5,6-dihydro-2H-pyran preferentially underwent H/metal-exchange at the N-dis ...
1985