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Resistance sugar kinases

Treatment of bromomethyl acetate with the sodium salt of a dialkyl phosphite, followed by deacetylation with methoxide affords the corresponding dialkyl hydroxymethanephosphonate. If this is tosylated with tosyl chloride, and the product treated with nucleosides [protected at the 3 -(and 2 -, if present) hydroxy groups] and sodium hydride in DMF, the monoalkyl ester of a 5 -0-phosphonyl-methyl nucleoside (60) is obtained after deblocking the sugar, and subsequent dealkylation with TMS-iodide affords (61). Like alkyl esters of 5 -mononucleotides, (60) is resistant to acid and alkaline hydrolysis, while (61) is stable in acidic and alkaline media, and is also resistant to hydrolysis by alkaline phosphomono-esterase and snake venom 5 -nucleotidase. Treatment of (61) with DCC and morpholine, and subsequently with orthophosphate or pyrophosphate, affords (62) and (63), respectively. Alkaline phosphomonoesterase from E. co/i hydrolyses the pyrophosphate links in (62) and (63) to give (61) and orthophosphate. The UTP and CTP analogues (63 B = U or C) are inhibitors of uridine kinase from... [Pg.170]


See other pages where Resistance sugar kinases is mentioned: [Pg.365]    [Pg.177]    [Pg.612]    [Pg.86]    [Pg.381]    [Pg.323]    [Pg.325]    [Pg.1629]    [Pg.564]    [Pg.155]    [Pg.4]    [Pg.6]   
See also in sourсe #XX -- [ Pg.163 ]




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Kinase Resistance

Kinases, sugar

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