trifluoroacetic acid in dichloromethane T=0 - 20°C; Inert atmosphere;

1: piperidin-4-one hydrochloride With tris-(dibenzylideneacetone)dipalladium(0); toluene-4-sulfonic acid hydrazide; lithium tert-butylate; 2-(dicyclohexylphosphino)-2',4',6'-tri-i-propyl-1,1’-biphenyl in 1,4-dioxane 0.0166667 h; Inert atmosphere; 2: para-bromotoluene in 1,4-dioxane T=110°C; 19 h; Inert atmosphere;

hydrogenchloride; formaldehyd; ammonium chloride

palladium aluminium oxide; nitrobenzene T=160°C;