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Penem

Carbanions stabilized by phosphorus and acyl substituents have also been frequently used in sophisticated cyclization reactions under mild reaction conditions. Perhaps the most spectacular case is the formation of an ylide from the >S-lactam given below using polymeric Hflnig base (diisopropylaminomethylated polystyrene) for removal of protons. The phosphorus ylide in hot toluene then underwent an intramolecular Wlttig reaction with an acetyl-thio group to yield the extremely acid-sensitive penicillin analogue (a penem I. Ernest, 1979). [Pg.32]

ANHBIOHCS - BETA-LACTAMS - CARBAPENEMS AND PENEMS] pol 3) 1-Dehydropiperidine [28299-36-7]... [Pg.283]

See other pages where Penem is mentioned: [Pg.32]    [Pg.45]    [Pg.75]    [Pg.75]    [Pg.75]    [Pg.129]    [Pg.160]    [Pg.160]    [Pg.170]    [Pg.170]    [Pg.175]    [Pg.182]    [Pg.187]    [Pg.197]    [Pg.219]    [Pg.257]    [Pg.274]    [Pg.383]    [Pg.383]    [Pg.383]    [Pg.383]    [Pg.392]    [Pg.392]    [Pg.392]    [Pg.392]    [Pg.420]    [Pg.445]    [Pg.446]    [Pg.484]    [Pg.497]    [Pg.498]    [Pg.501]    [Pg.507]    [Pg.548]    [Pg.606]    [Pg.614]    [Pg.618]    [Pg.630]    [Pg.639]    [Pg.639]    [Pg.639]    [Pg.639]    [Pg.639]    [Pg.701]    [Pg.711]   
See also in sourсe #XX -- [ Pg.450 ]

See also in sourсe #XX -- [ Pg.127 ]

See also in sourсe #XX -- [ Pg.651 , Pg.730 , Pg.756 ]



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Azetidinone penem from

CARBAPENEMS AND PENEMS

Cephalosporins penem synthesis

Of penems

Penem 2-alkyl

Penem 2-alkylthio

Penem 2-amino

Penem 2-hydroxy

Penem 2-methoxy

Penem 2-thio

Penem analogues

Penem antibiotic

Penem derivative

Penem sulfone

Penem synthesis

Penems

Penems 3-lactamase inhibitors

Penems absolute stereochemistry

Penems by azetidinone synthesis

Penems synthesis

Penems via cycloaddition with CSI

Synthesis of a Carbapenem and Penem Precursor

Triazolylmethylene penem

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