p-TSA; potassium carbonate in methanol

1: With 3,4,5,6-tetrahydro-1(2H)-pyrimidinone; 1,1-dimethylethylmagnesium chloride in tetrahydrofuran; diethyl ether T=-20 - 20°C; 3 h; 2: With toluene-4-sulfonic acid in methanol T=60°C; 3 h;