1: (Z)-9-octadecenoic acid With O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate; triethylamine in ethyl acetate T=20°C; 1 h; 2: 1-(3,4-dihydroxyphenyl)-2-amino-ethane in ethyl acetate T=20°C; 12 h;

(benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate; triethylamine in tetrahydrofuran Ambient temperature;

1: Et3N / tetrahydrofuran / 0.25 h 2: Et3N / tetrahydrofuran / Ambient temperature View Scheme

triethylamine in tetrahydrofuran Ambient temperature; Yield given;