ChemInform Abstract: 3-Hydroxy-4-pyrones as Precursors of 4-Methoxy-3-oxidopyridinium Ylides. An Expeditious Entry to Highly Substituted 8-Azabicyclo(3.2.1) octanes.

ChemInform Abstract: Use of an Iodonium

ChemInform Abstract: Use of an Iodonium Ylide in the Synthesis of p-Nitrobenzyl (6R,7S) 3-Hydroxy-8-oxo-7-phenoxyacetamido-1-azabicyclo [4.2.0]octa-2-ene-2-carboxylate.

✍ R. K. VAID; T. E. HOPKINS 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 29 KB 👁 2 views

Use of an Iodonium Ylide in the Synthesis of p-Nitrobenzyl (6R,7S) 3-Hydroxy-8-oxo-7-phenoxyacetamido-1-azabicyclo [4.2.0]octa-2-ene-2-carboxylate. -The title compound (IV), a key intermediate in the synthesis of carbacephalosporins, is prepared by Rh(II)-catalyzed cyclization of the iodonium ylide