T=600°C; P=0.1 - 1 Torr;

1: vinyl acetoacetate With (DL)-norvaline in dichloromethane 0.0833333 h; 2: 2,2-dibromo-5,5-dimethyl cyclohexane-1,3-dione With dipyridinium dichromate in dichloromethane 2 h; Cooling with ice; optical yield given as percent eeenantioselective reaction;