Envirocat EPZG in water; acetone T=80°C; 3 h;

1: dimethylsulfone With Di-n-butylmagnesium in tetrahydrofuran; n-heptane T=20°C; 0.75 h; 2: N'-cyclododecylidene-4-methylbenzenesulfonohydrazide in tetrahydrofuran; n-heptane T=20°C; 1.5 h; Further stages.;