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Penicillin ring skeleton

Dihydro-4H-l,4-thiazines from penicillin ring skeleton... [Pg.400]

Startg. amide hydrazone allowed to react with NaH in dry 1,2-dimethoxyethane at 60-65° for 15 min., the resulting a-diazo amide dissolved in methylene chloride and irradiated at 10° with a 100-w. lamp with output mainly at 366 m -> bicyclic -lactam. Y 50%. — The lactam is formed stereospecifically. It can also be obtained by thermal cyclization. Also penicillin ring skeleton s. E. J. Gorey and A. M. Felix, Am. Soc. 87, 2518 (1965). [Pg.232]

Without additional reagents Cephalosporin from penicillin ring skeleton WM.r. O... [Pg.146]

Sodium carbonate Thiazolidine ring opening of the penicillin ring skeleton via sulfonium salts... [Pg.210]

See other pages where Penicillin ring skeleton is mentioned: [Pg.239]    [Pg.258]    [Pg.268]    [Pg.281]    [Pg.435]    [Pg.70]    [Pg.249]    [Pg.258]    [Pg.264]    [Pg.170]    [Pg.301]    [Pg.327]    [Pg.604]    [Pg.221]    [Pg.247]    [Pg.272]    [Pg.252]    [Pg.259]    [Pg.238]    [Pg.310]    [Pg.237]    [Pg.399]    [Pg.244]   
See also in sourсe #XX -- [ Pg.16 , Pg.541 ]

See also in sourсe #XX -- [ Pg.16 ]

See also in sourсe #XX -- [ Pg.16 , Pg.541 ]

See also in sourсe #XX -- [ Pg.16 ]

See also in sourсe #XX -- [ Pg.21 ]



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