1: With tributylphosphine in tert-butyl alcohol Morita-Baylis-Hillman type reaction; Inert atmosphere; 2: With N-benzyl-N,N,N-triethylammonium chloride; potassium hydroxide in dichloromethane; water; tert-butyl alcohol Inert atmosphere;

tri-n-butyl-tin hydride in benzene T=20 - 80°C; 3 h; Inert atmosphere;