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Trimethylene dithioacetals

Ci2H20O4S2 5-Deoxy-3-C-formyl-1,2-O-isopropylidene- -L-lyxofuranose 31-(trimethylene dithioacetal) DFPLXT10 34 32 358 366... [Pg.389]

Deoxygenation of 2-Deoxy-6,7-isopropylidene-3,5-Di-0-Methyl-L-Mamo-HeptoSe-Trimethylene Dithioacetal 33 [46]... [Pg.162]

C9Hi804S2 5-Deoxy-3-C-formyl-/3-L-lyxofuranose 3 -(trimethylene dithioacetal),24 m.p. 128°C... [Pg.362]

C12H20O4S2 5-Deoxy-3-C-formyl-l,2-0-isopropylidene-/3-L-lyxofura-nose 31-(trimethylene dithioacetal)34... [Pg.358]

This acetal interchange is applicable also to trimethylene dithioacetals, as shown by conversion of the 1,3-dithane derivative (1) into the hemithioacetal... [Pg.382]

The isopropylidenation of aldose trimethylene dithioacetals is covered in Chapter 6 and the acetolysis of aldose diethyl dithioacetals in Chapter 7. The C-C-l(C-2 bond cleavage of the a-oxoketene dithioacetal 7 on exposure to mineral acid is referred to in Chapters 13 and 14. The phenylthio precursor 8 of 2-keto-3-deoxy-D-flraZ //io-heptonic acid has been prepared by chain-extension of 2,3 4,5-di-O-cyclohexylidene-D-arabinose with PhSCH2C02Me, followed by de-protection. ... [Pg.159]

Paulsen s group has transformed the protected streptosyl chloride (or bromide) (521 RS = Ph,H) into dihydrostreptosylstreptidine (522) and related pseudo-disaccharides. ° ° The 2,3-0-benzylidene derivatives (521 R R = Ph,H) yielded a-linked glycosides of L-streptose preferentially, whereas the 2,3-carbonates (521 R R = O) gave / -linked glycosides e.g. with cyclohexanol and l,2,3,4-tetra-0-acetyl-)5-D-glucopyranose). ° This work culminated in the synthesis of D-streptobiosamine (523) and its L-enantiomer (a disaccharide unit of streptomycin) by a route that involved condensation of methyl a-o(or L)-strepto-side 3 -(trimethylene dithioacetal) with the nitrosyl chloride adduct of 3,4,6-tri-O-acetyl-D-(or L)-glucal. ... [Pg.161]

Antibiotics and Components Thereof.—Pillaromycin [the component sugar was shown to be 2,3,6-trideoxy-4-C-(hydroxymethylcarbonyl)-L-t/rr ( -hexose] (246), 5-deoxy-3-C-formyl-jS-L-lyxofuranose trimethylene dithioacetal, and the corresponding 1,2-O-isopropylidene derivative. ... [Pg.189]

See other pages where Trimethylene dithioacetals is mentioned: [Pg.1029]    [Pg.1029]    [Pg.162]    [Pg.88]    [Pg.37]    [Pg.38]    [Pg.39]    [Pg.90]    [Pg.88]    [Pg.799]    [Pg.799]    [Pg.799]    [Pg.1147]    [Pg.1147]    [Pg.1150]   
See also in sourсe #XX -- [ Pg.382 ]

See also in sourсe #XX -- [ Pg.382 ]



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Trimethylene

Trimethylene dithioacetal, preparation

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