1: With N-bromosuccinmide; triphenylphosphine in dichloromethane T=0°C; 0.333333 h; 2: 6-chloro-1-cyclopropylmethyl-1H-indole-3-carboxylic acid in dichloromethane T=0 - 25°C; 1 h; 3: 2-amino-thiazole in dichloromethane T=25°C; 24 h;