Methyl [[(methoxycarbonyl)amino](methylthio)methylene]carbamate → Methyl (6-{4-[6,7-bis(methyloxy)quinolin-4-yl]-2,3,4,5-tetrahydro-1,4-benzoxazepin-7-yl}-1h-benzimidazol-2-yl)carbamate

Participants

Reaction Conditions

Reaction Steps

A solution of 4-{-4-[6,7-bis(methyloxy)quinolin-4-yl]-2,3,4,5-tetrahydro-1,4-benzoxazepin-7-yl}-2-nitroaniline (56 mg, 0.12 mmol) in methanol (20 mL) was hydrogenated at 30 psi over 10% Pd—C (25 mg) for 4 h. The catalyst was filtered off, and the filtrate was concentrated to give 4-{4-[6,7-bis(methyloxy)quinolin-4-yl]-2,3,4,5-tetrahydro-1,4-benzoxazepin-7-yl}benzene-1,2-diamine (40 mg, 77% yield) as a brown oil. MS (EI) for C26H26N4O3: 443 (MH STEP 5: To a solution of 4-{4-[6,7-bis(methyloxy)quinolin-4-yl]-2,3,4,5-tetrahydro-1,4-benzoxazepin-7-yl}benzene-1,2-diamine (40 mg, 0.09 mmol) in acetic acid (2 mL) was added 1,3-bis(methoxycarbonyl)-2-methyl-2-thiopseudourea (19 mg, 0.09 mmol) and the reaction mixture was stirred at 80° C. for 30 min. After cooling to room temperature the mixture was concentrated, and purified by preparative reverse phase HPLC to provide methyl (6-{4-[6,7-bis(methyloxy)quinolin-4-yl]-2,3,4,5-tetrahydro-1,4-benzoxazepin-7-yl}-1H-benzimidazol-2-yl)carbamate (17 mg, 25% yield) as a brown solid. 1H NMR (400 MHz, CD3OD): 8.30 (d, 1H), 7.78 (m, 2H), 7.68 (m, 2H), 7.60 (m, 1H), 7.27 (d, 2H), 7.11 (d, 1H), 7.04 (d, 1H), 5.17 (s, 2H), 4.64 (m, 2H), 4.25 (m, 2H), 4.01 (s, 3H), 3.96 (s 3H), 3.63 (s, 3H); MS (EI) for C29H27N5O5: 526 (MH+).

Provenance & Evidence