C[Si](C)(C)[C:3]1[CH:4]=[C:5]([CH2:9][C:10]([OH:23])(P(=O)(OC)OC)P(=O)(OC)OC)[CH:6]=[CH:7][CH:8]=1.[CH2:26]([NH2:33])[C:27]1[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=1.CC1C=CC(S(O)(=O)=O)=CC=1>C(Cl)(Cl)Cl>[CH2:26]([NH:33][C:10](=[O:23])[CH2:9][C:5]1[CH:6]=[CH:7][CH:8]=[CH:3][CH:4]=1)[C:27]1[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=1The iodo derivative 53 was hydrolysed as described under general procedures to give the title compound as an orange colored powder in quantitative yield. Reaction of dimethyl phenylacetylphosphonate (50b) with benzylamine To a solution of the phosphonate 50b in CHCl3 (5 ml) was added molecular sieves (4A, 0.25 g) followed by benzylamine (0.11 g, 1 mmol). After 0.5 h a catalytic amount of TsOH was added and the mixture was stirred for 2 h. The mixture was filtered and flash chromatography (silica, 3:7 EtOAc/hexane) of the filtrate provided N-benzylphenylacetamide (61), as determined by comparison with an authentic sample.
Wird geladen…
