反应详情

6β-Phenoxyacetamido-2,2-dimethylpenam-3α-carboxylic acid (3.50 g, 10 m.moles) was added to a mixture of isopropyl nitrite (2.40 g, 27 m.moles) and diphenylmethylamine (2.21 g, 12 m.moles) in tetrahydrofuran (50 ml) at 35° and stirred for 3 hours. The solvent was removed in vacuo and the gum dissolved in chloroform (50 ml), which solution was washed with 5% sodium bicarbonate solution (50 ml) and then water (50 ml) to leave a gum of the title ester. Yield 2.11 g (40.8% based on the input penicillin acid).

1. customThe solvent was removed in vacuo
2. dissolutionthe gum dissolved in chloroform (50 ml)
3. washwhich solution was washed with 5% sodium bicarbonate solution (50 ml)