The penems, a new class of. beta.-lactam antibiotics. 4. Syntheses of racemic and enantiomeric penem carboxylic acids

HR Pfaendler, J Gosteli…

Index: Pfaendler,H.R. et al. Journal of the American Chemical Society, 1979 , vol. 101, # 21 p. 6306 - 6310

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Citation Number: 62

Abstract

... 4. Syntheses of Racemic and Enantiomeric Penem Carboxylic Acids HR Pfaendler,* J. Gosteli, and RB Woodward+ Contribution from the Woodward Research Institute, CH-4002. Basel, Switzerland. ... Found: C, 67.83; H, 6.61; Page 5. 6310 Journal of the American Chemical Society / 101:21 / October 10, 1979 N. 2.30; S, 5.23. Acetonyl [4(S)-(cis-~-Carbomenthyloxyvinylmercapto) azeti- din-2-on-l-yl]triphenylphosphoranylideneacetate (18). ...