| 摘要 |
Title compds. II [X=(a), (b); R1=azido, amino, 1- methoxycarbonylpropen-2-yl amino, carbobenzyloxyamino; R2=H, OH! were prepd. Thus, 424 mg chloromethyl-6-(α-azido phenylacetamido) penicillanate in 5 ml dimethylformamide was reacted with 474 mg tetrabutylammonium penicillanate-1,1-dioxide, diluted with 50 ml ethyl acetate, washed with water, concd., and chromatog. on a 40 g silica gel plate to give 320 mg 6'-(α-azidophenylacetamido) penicillanoyl oxymethyl penicillanate-1,1-dioxide.
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