in 1-methyl-pyrrolidin-2-one T=150 - 170°C; 2.5 h;

in 1-methyl-pyrrolidin-2-one T=150 - 170°C; 2.5 h;

1: bis(trichloromethyl) carbonate With triethylamine; triphenyl-phosphine oxide in chlorobenzene T=20°C; 0.5 h; Cooling with ice; 2: 2-amino-3-chlorobenzonitrile in chlorobenzene T=120°C; 8 h;

1: With diisobutylaluminium hydride in dichloromethane; toluene T=20°C; 24 h; 2: With sodium hydroxide in dichloromethane; toluene T=20°C; 0.25 h; Further stages.;