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A-D-Galactopyranose

Starting from (—)-29, carba-a-D-galactopyranose (7) and carba-) -D-glu-copyranose (94) have been synthesized by a reaction analogous to that employed in the preparation of the racemates. - ... [Pg.36]

Carba-a-D-galactopyranose (7) has also been synthesized from quebrachi-tol, by Paulsen and coworkers,as well as carba- -D-mannopyranose (114). [Pg.40]

Difluoro compounds have been prepared by treatment of carbonyl compounds with DAST. These are methyl 5-deoxy-5,5-difluoro-2,3,-0-isopropylidene-)S-D-ribofuranoside, 6-deoxy-6,6-difluoro-1,2 3,4-di-0-isopropylidene-a-D-galactopyranose, methyl 2-deoxy-2,2-difluoro-... [Pg.152]

Deoxy-3-[ F]fluoro-D-glucose ( F-3DFG) was prepared - 454,467,473-476 essentially according to the procedure for the cold synthesis (see Section 11,2), namely, treatment of248 with Cs F (in DMF or HMPA), tetraalkylammonium [ F]fluoride (DMF, HMPA, or MeCN) or K F (in acetamide). 6-Deoxy-6-[ F]fluoro-a-D-galactopyranose was likewise pre-pared aceording to the cold synthesis. ... [Pg.199]

C18H28O10 3,4,6-Tri-0-acetyl-l,2-0-(R)-(l-tert-butoxyethylidene)-a-D-galactopyranose (ACALPB)80... [Pg.252]

C6H1206 Ca2+ Br2 3 H20 a-D-Galactopyranose calcium bromide, trihydrate CAGALA10 31 349... [Pg.383]

A satisfactory result was obtained in AgOTf- or NIS/TfOH-activated condensation of S-benzothiazolyl pentofuranosides 93, 94 and 95 with l,2 3,4-di-isopropylidene-a-D-galactopyranose 96 and l,6-anhydro-3,4-isopropylidene-P-D-galactopyranose 97 as the acceptor to afford the corresponding disaccharides in moderate to good yields and stereoselectivity [445],... [Pg.294]

Scheme 10.—Proposed Mechanism for Type II Reaction of l,2 3,4-Di-0-isopropyli-dene-6-O-pyruvoyl-a-D-galactopyranose (20). Scheme 10.—Proposed Mechanism for Type II Reaction of l,2 3,4-Di-0-isopropyli-dene-6-O-pyruvoyl-a-D-galactopyranose (20).
When the esters listed in Table IX are irradiated, typical carbonyl reactions result that is, each of these compounds (22-27) experiences both a-cleavage and hydrogen-abstraction reactions. For the esters of l,2 3,4-di-0-isopropylidene-a-D-galactopyranose (22-26), the hydro-gen-abstraction reaction is internal, and leads69 to a Type II reaction... [Pg.129]

The photochemical reactions of xanthides are quite complex. They are solvent-, concentration-, temperature-, wavelength-, and time-de-pendent.130 The most thoroughly studied of these compounds is compound 64, whose irradiation (through a Corex filter) in cyclohexane under nitrogen produces tetrasulfide 69 (37% yield), xanthate 70 (35%), l,2 3,4-di-0-isopropylidene-a-D-galactopyranose (71, 13%), sulfur, and carbonyl sulfide. Irradiation of a dilute solution of 64 produced only 70 (in 74% yield). The most intriguing finding from irradiation of the xanthides 64-66 is the fact that 66 produces a xanthate... [Pg.158]

See other pages where A-D-Galactopyranose is mentioned: [Pg.1052]    [Pg.31]    [Pg.1052]    [Pg.1011]    [Pg.119]    [Pg.123]    [Pg.123]    [Pg.113]    [Pg.116]    [Pg.185]    [Pg.109]    [Pg.115]    [Pg.115]    [Pg.141]    [Pg.150]    [Pg.90]    [Pg.93]    [Pg.219]    [Pg.239]    [Pg.241]    [Pg.242]    [Pg.19]    [Pg.340]    [Pg.371]    [Pg.382]    [Pg.385]    [Pg.385]    [Pg.390]    [Pg.399]    [Pg.402]    [Pg.51]    [Pg.302]    [Pg.302]    [Pg.131]    [Pg.92]    [Pg.187]   
See also in sourсe #XX -- [ Pg.371 ]

See also in sourсe #XX -- [ Pg.21 , Pg.257 ]

See also in sourсe #XX -- [ Pg.38 ]

See also in sourсe #XX -- [ Pg.511 ]

See also in sourсe #XX -- [ Pg.511 ]



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5a-Carba-a-D-galactopyranose

6-Deoxy-a-D-galactopyranose

Carba-a-D-galactopyranose

D-Galactopyranose

Galactopyranose

Galactopyranose, a-D-, crystal structure bibliography preparation

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