1: With water; potassium hydroxide in ethanol T=20°C; 1.5 h; 2: With hydrogenchloride; water

sodium chlorite; 2-methyl-but-1(2)-ene

1: 4-bromo-1H-indole-3-carboxylic acid With oxalyl dichloride; N,N-dimethyl-formamide in dichloromethane 1.5 h; Inert atmosphere; 2: methanol in dichloromethane T=0 - 20°C;

in diethyl ether Yield given;