1: With tributylphosphine in tert-butyl alcohol T=20°C; Morita-Baylis-Hillman type reaction; 3 h; Inert atmosphere; 2: With N-benzyl-N,N,N-triethylammonium chloride; potassium hydroxide in dichloromethane; water; tert-butyl alcohol T=20°C; Inert atmosphere;