The title compound was prepared in good yield via intramolecular insertion of an a-alkoxycarbonyl, a-sulphonyl carbene into the N-H bond of an azetidinone. Esters of (k) 7-oxo-3-thia-l-azabicyclo[3.2.0lheptane-2-carboxylate-3,3-dioxide, 1, are potentially useful intermediates in the synthesis of no
A short synthesis of (±) 7-oxo-3-oxa-1-azabicyclo[3.2.0] heptane-2-carboxylic acid.
✍ Scribed by Dieter Häbich; Paul Naab; Karl Metzger
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- French
- Weight
- 221 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0040-4039
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📜 SIMILAR VOLUMES
The synthesis of a d'carbapenem and two ,?-lactams possessing a Br-atom at the N-substituting center not involved in the lactam ring and bearing the carboxyl group is described. The ,?-lactams having this kind of Br-substitution are more susceptible to nucleophilic attack than those having a conjuga
Allylic oxidation of 4-allyl-1-dimethyl-t-butylsilylazetidin-2ones (5,7) gave the 4-(l-hydroxyprop-2-ene-1-yl) derivatives (6,8). Radical benzoyloxylation of the silylated 8-oxo-7-azabicyclo[4.2.O]oct-3ene (18) provided four allylic monobenzoates. Progression of ( ) and ( ) afforded, respectively,
## Abstract The synthesis of the title compound is described.
3R)-4-Acetoxy-3-trimethylsilyl-2-azetidinone, was converted into optically pure benzyl penicillanate in seven steps (22%) using (benzyloxy)nitromethane as a reagent for ring annulation.