C(=O)([O-])[O-].[K+].[K+].[P:7](Cl)([O:12][CH2:13][CH3:14])([O:9][CH2:10][CH3:11])=[S:8].[C:16]([C:18]1[S:19][C:20]([CH3:24])=[CH:21][C:22]=1[OH:23])#[N:17]>CC(C)=O>[C:16]([C:18]1[S:19][C:20]([CH3:24])=[CH:21][C:22]=1[O:23][P:7]([O:12][CH2:13][CH3:14])([O:9][CH2:10][CH3:11])=[S:8])#[N:17]7 g of potassium carbonate and 9.5 g of O,O-diethyl chlorothiophosphate were added to a solution of 7 g of 2-cyano-3-hydroxy-5-methyl-thiophene in 100 ml of acetone and the mixture was stirred for 15 hours at 20° C. and was then filtered. The filtrate was evaporated to dryness and the residue was chromatographed over silica gel. Elution with an 8-2 cyclohexane-ethyl acetate mixture yielded 11.2 g of 2-cyano-3-(diethoxythiophosphoryloxy)-5-methyl-thiophene with a refractive index of nD20 =1.534.
Wird geladen…
