Unsaturated macrocyclic compounds. LVIII. Reaction of trans-1,4-dibromo-2-butene and trans-1,4-dichloro-2-butene with ethynylmagnesium bromide. Synthesis of precursors of fully conjugated 14-, 16-, 20-, and 26-membered ring cyclic compounds
Unsaturated macrocyclic compounds. LVIII. Reaction of trans-1,4-dibromo-2-butene and trans-1,4-dichloro-2-butene with ethynylmagnesium bromide. Synthesis of precursors of fully conjugated 14-, 16-, 20-, and 26-membered ring cyclic compounds