Pyridine → HCID 46945492, compound

Temperature

23 °C

To a solution of alcohol 4 (20.6 g, 79.1 mmol) in CH2Cl2 (200 mL) is added pyridine (8.12 g, 102.8 mmol) and ethyl chlorosulfite (12.2 g, 94.9 mmol). The reaction mixture is stirred at 23° C. for 10 hours. The reaction is quenched with water (100 mL) and extracted with CH2Cl2 (2×100 mL). The combined organic layers are washed with HCl (1N, 100 mL), saturated NaHCO3 (100 mL), brine (100 mL) and dried over anhydrous sodium sulfate. The solvent is removed and the residue is purified by silica gel chromatography (1→10% ethyl acetate/hexane) to give 2,2-bis(hexyloxy)propanyl ethyl sulfite 6 (24.5 g, 88%) as a colorless oil: Rf (15% EtOAc/hexane)=0.44; IR (thin film, cm−1) 2932, 2872, 1467, 1379, 1213, 1194, 1176, 1001, 888; 1H NMR (600 MHz, CDCl3) δ 4.11-4.00 (m, 2H), 3.93 (d, J=10.8 Hz, 1H), 3.77 (d, J=10.8 Hz, 1H), 3.42-3.37 (m, 4H), 1.51-1.48 (m, 4H), 1.33 (s, 3H), 1.31-1.24 (m, 15H), 0.85 (t, J=7.2 Hz, 6H); 13C NMR (150 MHz, CDCl3) δ 99.0, 62.9, 60.8, 58.5, 58.3, 31.6, 29.8, 25.9, 22.6, 20.9, 15.3, 14.0.

1. customThe reaction is quenched with water (100 mL)
2. extractionextracted with CH2Cl2 (2×100 mL)
3. washThe combined organic layers are washed with HCl (1N, 100 mL), saturated NaHCO3 (100 mL), brine (100 mL)
4. dry with materialdried over anhydrous sodium sulfate
5. customThe solvent is removed
6. customthe residue is purified by silica gel chromatography (1→10% ethyl acetate/hexane)

ORD record

ord-07d5da7df97e4ef7b0d6e464d57fe696

Source dataset

uspto-grants-2013_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08435756B2