pyridine; triethylamine T=20°C; 18 h;

1: CH2=CHCH2PPh3(1+)*Br(1-) With n-butyllithium in diethyl ether; hexane T=25°C; Metallation; 1 h; 2: 3-methyl-2-butenal in diethyl ether T=25°C; Condensation; 0.25 h; 3: With water T=25°C; Decomposition; 0.166667 h;

1: 88 percent / acetonitrile / 1.) reflux, 90 min, 2.) r.t., 80 h 2: 92 percent / 1 M BH3*THF / CH2Cl2 View Scheme

multistep reaction; variation of temperature and reaction time; Product distribution;