2,4,6-trichloro-1,3,5-triazine in 1,4-dioxane 12 h; Heating;

zinc 5,10,15,20-tetraphenylporphyrin; oxygen in chloroform-d1 T=25°C; 0.5 h; Irradiation;

1: Boc-Cys((O)-E-carbomethoxyethenyl)-OEt With n-butyllithium; cyclohexyl-mercaptan in tetrahydrofuran T=-78°C; 0.0166667 h; Inert atmosphere; 2: p-methylbenzyl bromide in tetrahydrofuran T=-78 - 20°C; Inert atmosphere;

nitric acid

1: alcoholic potassium sulfide solution 2: nitric acid View Scheme