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Additional resources for Carbohydrate Chem, Monosaccharides, disaccharides and specific oligosaccharides a review of the recent literature publ. during 1988

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Stack, FEMS Microbiol. Lett,, 1 9 8 7 . 48, 83 (Chem. , 1 9 8 8 . 108. Heusinger, Carbohvdr. , 19811, 61 62 (w 71 7 6 3 ) . m, 67. 3 Glycosides and Disaccharides A Review= covering the formation, structures and chemical reactivities of free radicals at the anomeric centres of carbohydrate derivatives is of relevance to aspects of the chemistry covered in this Chapter. 4 Two complementary approaches have utilised the fact that anomeric free radicals also bearing alkoxy groups at the anomeric centre can be expected to abstract hydrogen from the axial direction and thus give access to 8-D-glucopyranosides, for example.

1988, 265. Cao, Yiyao Gonwe, 1987, B, 270 (Chem. Abstr, , 1988, 108, 22 162). Plaza Lopez-Espinosa,Carbohvdr. Res,, 1988 41. , 1988, B ,1193. Jarosz, Carbohgdr. , 1988, 3 8 3 , 201. Jarosz, Carbohydr. , 1988, 181, 209. Boratynski, Carbohvdr. Res, , 1988, LU, c5. Takahashi, Carbohvdr. Res,, 1988, 183, 59. 4458. Asai, Bull. Chem. SOC. Hiquily, J. Chem. Enz. , 1988, 108,174 359). Adachi,w o n Chikusan Gakkaiho, 1987, 58, 681 (Chem. , 1988, 109, 73 802). Savino, 464 I:Chem, Jourrt. Cal orim Anal , Therm.

An interesting and potentially useful new glycosylating method involving the use of pent-4-enyl glycosides as glycosyl donors has been applied to disaccharide syntheses as illustrated in Scheme 6. It has also been applied likewise with Reaged: L, I(C0Llklme)~CL0+ or NBS Scheme 6 OBn D-mannopyranosyl donors and with a range of primary and secondary 3: Glycosides and Disaccharides 25 monosacchnride hydroxy compounds. ~~ Another novel synthetic method, this time of p-D-glucosides with high selectivity, involves the use of thio-orthoesters and their radical-mediated desulphurisation.

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