Pyridine → HCID 12874246、化合物

反応式

S(Cl)(Cl)=O.[CH2:5]([O:7][P:8]([CH:13](O)[C:14]1[CH:19]=[CH:18][C:17]([O:20][CH3:21])=[CH:16][CH:15]=1)(=[O:12])[O:9][CH2:10][CH3:11])[CH3:6].C(Cl)[Cl:24].N1C=CC=CC=1>O>[CH2:5]([O:7][P:8]([CH:13]([Cl:24])[C:14]1[CH:19]=[CH:18][C:17]([O:20][CH3:21])=[CH:16][CH:15]=1)(=[O:12])[O:9][CH2:10][CH3:11])[CH3:6]

参加物

実験手順

9.2 g (0.0768 mol) of thionyl chloride were added to a mixture of 20.2 g (0.0725 mol) of 4-methoxy-α-hydroxy-benzyl-phosphonic acid diethyl ester, 65 g of methylene chloride and 5.8 g (0.0725 mol) of pyridine at 20°-40° C. in the course of about 1 hour, while cooling slightly with water. The reaction mixture was then heated under reflux for 3 hours and subsequently stirred for 12 hours, without further action of heat. The mixture was poured into about 100 g of ice-water and the organic phase was separated off and dried. After distilling off the solvent, the residue was concentrated under 6 mm Hg and at 45° C. 21 g (97.7% of theory) of 4-methoxy-α-chloro-benzyl-phosphonic acid diethyl ester were obtained as a yellow viscous oil with a purity of 98.6% (gas chromatogram) and with a refractive index of nD24 : 1.5118.