反应详情

To a solution of 4-iodo-phenylamine (1 g, 4.57 mmol) in DCM (25 ml) were successively added AcOH (0.523 ml, 9.13 mmol), (4-formyl-cyclohexyl)-carbamic acid tert-butyl ester (1.14 g, 5.02 mmol) and NaBH(OAc)3 (1.94 g, 9.13 mmol) at RT. The reaction mixture was stirred at RT for 1 h then diluted with Et2O and washed successively with a 2M aqueous HCl solution and a 2M aqueous Na2CO3 solution. The organic phase was dried over Na2SO4, filtered and evaporated to dryness. The resulting crude material was purified by Combi-Flash Companion™ (Isco Inc.) column chromatography (SiO2; gradient elution, heptane/AcOEt 95:5→1:1) to yield the title compound (1.56 g, 3.62 mmol, 79%) as a colorless solid. TLC: RF=0.72 (heptane/AcOEt 1:1); HPLC: AtRet=2.64 min; LC-MS: m/z 431.4 [M+H]+; 1H NMR (400 MHz, DMSO-d6): 0.87-1.03 (m, 2H), 1.03-1.17 (m, 2H), 1.32-1.48 (m, 1H), 1.37 (s, 9H), 1.70-1.86 (m, 4H), 2.76-2.86 (m, 2H), 3.08-3.25 (m, 1H), 5.77-5.89 (m, 1H), 6.34-6.46 (m, 2H), 6.59-6.71 (m, 1H), 7.24-7.35 (m, 2H).

1. customat RT
2. washwashed successively with a 2M aqueous HCl solution
3. dry with materialThe organic phase was dried over Na2SO4
4. filtrationfiltered
5. customevaporated to dryness
6. customThe resulting crude material was purified by Combi-Flash Companion™ (Isco Inc.) column chromatography (SiO2; gradient elution, heptane/AcOEt 95:5→1:1)