Slusarchyk, William A.; Dejneka, Tamara; Gordon, Eric M., Heterocycles, 1984, vol. 21, # 1, p. 191 - 210
作者:Slusarchyk, William A.、Dejneka, Tamara、Gordon, Eric M.、Weaver, Eugene R.、Koster, William H.
DOI:——
日期:——
Practical synthetic approaches to intermediates for the preparation of the novel O-sulfonated-N-hydroxy-2-azetidinone antibiotics
作者:Marvin J. Miller、Atanu Biswas、Mark A. Krook
DOI:10.1016/s0040-4020(01)92150-7
日期:1983.1
preparation of a variety of monocyclicβ-lactamantibiotics is described. Hydroxaminolysis of N-protected serine esters provided the hydroxamic acids 10. Acylation followed by cyclization yielded the β-lactams 12. Solvolytic deacylation gave the parent N-hydroxy-2-azetidinones 7 which can be converted to the N- unsubstituted 2-azetidinones 8 or the novel O-sulfonated antibiotics 3. The N-unsubstituted-2-azetidinones