The kinetics of the thermal gas phase decomposition of 2-butoxypropene has been studied over the temperature range 640-680 K at pressure between 10 and 50 torr. 1-Butene and acetone were the only products and accounted for 63% of butoxypropene decomposition. These products are formed by homogeneous, unimolecular pathways with high pressure first order rate constant given by the equation: k(d)/S-1 = 10(10.80+/-0.24) exp(-171.3 +/- 2.9 KJ mol(-1)/RT) A six membered polar transition state is consistent with the kinetics data.