Ethyl 3-(step 3,cuatro-dihydroxy-benzamido)benzoate (3): Material step three is actually synthesized with respect to the general procedure having fun with twenty-two (0 0six g, 0.13 mmol) and was obtained as a white solid (0.03 g, 0.11 mmol, 81 %). 1 H NMR (500 MHz, DMSO): ?= (s, 1H), 9.63 (br s, 1H), 9.27 (br s,...