Dimethyl Sulfoxide → HCID 10380396、化合物

反応式

CS(C)=O.C(Cl)(=O)C(Cl)=O.[N:11]1[CH:16]=[CH:15][CH:14]=[C:13]([CH2:17][CH2:18][CH2:19][CH:20]([OH:32])[CH2:21][CH2:22][CH2:23][CH2:24][O:25][CH:26]2[CH2:31][CH2:30][CH2:29][CH2:28][O:27]2)[CH:12]=1>C(Cl)Cl>[N:11]1[CH:16]=[CH:15][CH:14]=[C:13]([CH2:17][CH2:18][CH2:19][C:20](=[O:32])[CH2:21][CH2:22][CH2:23][CH2:24][O:25][CH:26]2[CH2:31][CH2:30][CH2:29][CH2:28][O:27]2)[CH:12]=1

参加物

反応条件

温度: -78 °C

実験手順

A solution of 1.62 mL (22.73 mmol) of dimethylsulfoxide in 60 mL dry methylene chloride is cooled to -78° C. and 1.44 mL (16.53 mmol) oxalyl chloride is added dropwise. The mixture is stirred 0.5 hour at -78° C. and a solution of 1.0 g (3.31 mmol) of 1-(3-pyridyl)-4-hydroxy-8-(2-tetrahydropyranyloxy)octane in 15 mL dry methylene chloride is added and the mixture is stirred for 10 minutes at -78° C. The mixture is warmed to -60° C. and maintained for 15 minutes at that temperature. The reaction is quenched by the addition of 6.9 mL triethylamine. The cold bath is removed and the reaction allowed to warm to room temperature. The reaction mixture is extracted with 150 mL methylene chloride and washed with saturated sodium bicarbonate solution. The organic phase is dried, filtered, concentrated and chromatographed using 3:2 ethyl acetate, hexane to yield 1-(3-pyridyl)-4-oxo-8-(2-tetrahydropyranyloxy)octane; NMR (CDCl3): delta 2.6 (t,2H), 2.4 (t,4H).