7587-15-7Relevant articles and documents
A high temperature investigation using microwave synthesis for electronically and sterically disfavoured substrates of the Newman-Kwart rearrangement
Moseley, Jonathan D.,Lenden, Philip
, p. 4120 - 4125 (2008/01/03)
Electronically deactivated and/or sterically hindered substrates undergo the Newman-Kwart rearrangement (NKR) at around 300 °C, beyond the range of most convenient and safe, small-scale laboratory equipment. We report here the convenient conversions of several difficult substrates using modern microwave technology, which has proven ideal for investigating this high temperature reaction in all but the?most refractory of cases. In addition, several previously reported difficult examples were re-investigated, and found not to require high temperatures under these conditions, for various reasons which are elaborated upon.
Cephalosporin derivatives
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, (2008/06/13)
The present invention provides a novel series of cephem derivatives of the general formula I wherein R1, R2, R3, R5, R6, R7, A, L1, X, n and n′ are as defined herein above. The compounds of formula I are antibacterial agents useful in the treatment of infections in humans and other animals caused by a variety of gram-positive bacteria, particularly methicillin-resistant Staphylococcus aureus. Also included in the invention are processes for preparing the compounds of formula I and pharmaceutical compositions containing said compounds in combination with pharmaceutically acceptable carriers, diluents or excipients.