反应详情

To a solution of (E)-5-chloro-N-(8-(chloromethyl)-9-methyl-6,7-dihydro-5H-benzo[7]annulen-2-yl)picolinamide from step 3C (30 mg, 0.083 mmol) in ethanol (0.5 mL) was added thiourea (6.32 mg, 0.083 mmol). The mixture was heated to reflux for 3 h. The solvent was removed to give crude (2-(5-chloropicolinamido)-9-methyl-6,7-dihydro-5H-benzo[7]annulen-8-yl)methyl carbamimidothioate hydrochloride (36.3 mg, 0.083 mmol, 100% yield), which was used directly for the next step without purification. To a solution of the crude (2-(5-chloropicolinamido)-9-methyl-6,7-dihydro-5H-benzo[7]annulen-8-yl)methyl carbamimidothioate hydrochloride (36 mg, 0.082 mmol) in TFA (2 mL) was added trifluoromethanesulfonic acid (0.5 mL). The reaction mixture was stirred at rt for 16 h. The mixture was then concentrated and dried by azetropic distillation with toluene. The residue was then dissolved in 1.5 mL of MeOH, and a precipitate was removed by filtration. The mother liquor was purified via HPLC under standard conditions to give 5-chloro-pyridine-2-carboxylic acid (rel-(4aS,11bS)-2-amino-11b-methyl-4,4a,5,6,7,11b-hexahydro-3-thia-1-aza-dibenzo[a,c]cyclohepten-10-yl)-amide, 2,2,2-trifluoroacetate salt (16 mg, 0.030 mmol, 36% yield). LCMS (M+H)+=401.2. 1H NMR (500 MHz, methanol-d4) δ 8.72 (br. s., 1H), 8.21 (br. s., 1H), 8.08 (dd, J=8.4, 2.0 Hz, 1H), 7.90 (d, J=2.1 Hz, 1H), 7.58 (dd, J=8.1, 2.1 Hz, 1H), 7.28 (d, J=8.1 Hz, 1H), 3.22-3.10 (m, 1H), 2.99-2.80 (m, 3H), 2.57-2.40 (m, 2H), 2.10 (dd, J=14.7, 3.7 Hz, 1H), 1.90 (dd, J=14.5, 3.5 Hz, 1H), 1.87 (s, 3H), 1.64-1.52 (m, 1H)

1. temperatureThe mixture was heated
2. temperatureto reflux for 3 h
3. customThe solvent was removed
4. customto give crude (2-(5-chloropicolinamido)-9-methyl-6,7-dihydro-5H-benzo[7]annulen-8-yl)methyl carbamimidothioate hydrochloride (36.3 mg, 0.083 mmol, 100% yield), which
5. customwas used directly for the next step without purification
6. concentrationThe mixture was then concentrated
7. dry with materialdried by azetropic distillation with toluene
8. dissolutionThe residue was then dissolved in 1.5 mL of MeOH
9. customa precipitate was removed by filtration
10. customThe mother liquor was purified via HPLC under standard conditions