反应详情

To a solution of 3.47 g (12.8 mmol) of the Compound 3c in methylene chloride (100 mL) was added pyridinium chlorochromate (4.15 g, 19.2 mmol). The mixture was stirred for one hour, an additional pyridinium chlorochromate (2.0 g) was added, and the mixture was stirred 15 hours. Diethyl ether (200 mL) was added to the reaction mixture, and the solvent was decanted and evaporated. The residue was purified by chromatography (silica gel, chloroform) to afford the Compound 3d as light yellow crystals; m.p. 99°-101° C.; IR 1730 cm-1 (C=O); 1H NMR δ1.7-2.3 (m,2H, --CH2CH2CH2 --), 2.8-3.3 (m, 4H,--CH2CH2CH2 --), 6.13(s, 1H, --SCHS--), 7.8-8.7 (m,--3H, ArH), 10.45 (s, 1H,CHO).

1. stirringthe mixture was stirred 15 hours
2. customthe solvent was decanted
3. customevaporated
4. customThe residue was purified by chromatography (silica gel, chloroform)