acetic acid multistep reaction, other dienes, regiochemistry; Product distribution;

N,N,N',N',N'',N''-hexamethylphosphoric triamide; n-butyllithium; hexane; diisopropylamine 1.) THF, -78 deg C, 15 min; 2.) pentane, -78 deg C to RT; Yield given. Multistep reaction;

triethylamine in N,N-dimethyl-formamide T=100 - 110°C; 24 h;

in dichloromethane