反应详情

A solution of 4-((tert-butyldimethylsilyl)oxy)-1-(2-chloro-5-trityl-5H-pyrrolo[3,2-d]pyrimidin-7-yl)cyclohex-anol (1.00 g, 1.6 mmol) in CH2Cl2 (20 mL) was added MsCl (275 mg, 2.4 mmol) followed by NEt3 (808 mg, 8 mmol). The reaction mixture was stirred at room temperature for 6 hours, quenched with brine and extracted with EtOAc (3×). The combined organic layer was dried (MgSO4), filtered and concentrated. The residue was purified by ISCO to provide the desired product (485 mg, 50%). 1H NMR (400 MHz, CDCl3) δ 7.56 (s, 1H), 7.34 (s, 1H), 7.25-7.21 (m, 9H), 7.08-7.05 (m, 6H), 6.89 (s, 1H), 3.90-3.86 (m, 1H), 2.49-2.43 (m, 1H), 2.37-2.28 (m, 1H), 2.19-2.13 (m, 1H), 1.85-1.82 (m, 1H), 1.68-1.62 (m, 2H), 0.82 (s, 9H), 0.00 (s, 6H).

1. customquenched with brine
2. extractionextracted with EtOAc (3×)
3. dry with materialThe combined organic layer was dried (MgSO4)
4. filtrationfiltered
5. concentrationconcentrated
6. customThe residue was purified by ISCO