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Synthesis of 3-functionalised cephalosporins by photoinitiated bromination : Transformations of 2,2,2-trichloroethyl 1S, 6R, 7R)-3-bromomethyl-7-formamidoceph-3-em-4-carboxylate, 1-oxide

✍ Scribed by B.R. Cowley; D.C. Humber; B. Laundon; A.G. Long; A.L. Lynd

Book ID
108372029
Publisher
Elsevier Science
Year
1983
Tongue
French
Weight
882 KB
Volume
39
Category
Article
ISSN
0040-4020

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The synthesis of the title compound (4) is described. ## Treatment of (3S)-[(lR)-hydroxyethyl]-(4R)- [ 3-(p-nitrobenzyloxy) carbonyl-2-0x0-[ 2-I4C] -3-diazopropan-l-yl]azetidin-2-one1 with rhodium diacetate achieved ring closure forming (5R,6S)-pnitrobenzyl-6-~(1R)-hydroxyethyl]-3,7-dioxo-[3-14C]