β‐Alkyl‐α,β‐unsaturated esters from enol phosphates of β‐keto esters: methyl 2‐methyl‐1‐cyclohexene‐1‐carboxylate
intermediate: methyl 2‐oxocyclohexanecarboxylate
intermediate: Methyl 2‐(diethylphosphoryloxy)‐1‐cyclohexene‐1‐carboxylate
product: methyl 2‐methyl‐1‐cyclohexene‐1‐carboxylate
byproduct: 1‐acetyl‐2‐methylcyclohexene
solvent: petroleum ether