(benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate; N-ethyl-N,N-diisopropylamine in dichloromethane T=20°C; 16 h;

1: 2-bromo-4-methyl-1,3-thiazole-5-carboxylic acid With 4-methyl-morpholine; isobutyl chloroformate in dichloromethane T=0 - 20°C; 2 h; 2: 4-methyl-morpholine in dichloromethane T=0 - 20°C; 4 h;