N,1-dihydroxy-3,3-dimethyl-1,3-dihydrobenzo[c][1,2]oxaborole-5-carbimidoyl chloride → HCID 71572118, compound

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Reaction Conditions

Reaction Steps

To the solution of N,1-dihydroxy-3,3-dimethyl-1,3-dihydrobenzo[c][1,2]oxaborole-5-carbimidoyl chloride (0.526 mmol) in DMF (3 mL) was added 1,2,3,4-tetrachloro-5-(3,3,3-trifluoroprop-1-en-2-yl)benzene (245 mg, 0.789 mmol) and TEA (106 mg, 1.052 mmol) at rt. The mixture was stirred at 25° C. for 12 h, quenched with water, extracted with EA (3×10 mL). The combined organic layer was washed with brine, dried over Na2SO4, filtered and concentrated under reduced pressure. The residue was purified by prep-HPLC to give the final title compound 3,3-dimethyl-5-(5-(2,3,4,5-tetrachlorophenyl)-5-(trifluoromethyl)-4,5-dihydroisoxazol-3-yl)benzo[c][1,2]oxaborol-1(3H)-ol (52 mg; yield 13%) as a solid. 1H NMR (400 MHz, DMSO-d6): δ 9.20 (s, 1H), 7.98 (s, 1H), 7.83 (s, 1H), 7.76-7.47 (d, J=3.2 Hz, 2H), 4.67-4.63 (d, J=18 Hz, 1H), 4.37-4.35 (d, J=18.8 Hz, 1H), 1.49 (s, 3H), 1.48 (s, 3H) ppm; MS: m/z=514 (M+1, ESI+).

Provenance & Evidence