triethylamine in benzene 0.25 h;

1: 4-nitrobenzoyl (5,5-dimethyl-2-thioxo-1,3,2-dioxaphosphinan-2-yl) sulfide With 5,5-dimethyl-2-sulfanyl-2-thioxo-1,3,2-dioxaphosphorinane in benzene 4 h; Heating; 2: aniline With triethylamine in benzene Further stages.;