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X-Ray investigation of benzyl 3,4-anhydro-2-O-mesyl-6-O-trityl-α-d-altropyranoside: ring conformations in the 3,4-anhydropyranose system

✍ Scribed by Janusz W. Krajewski; Prezemyslz.xlaw Gluziński; Anna Banaszek

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
546 KB
Volume
225
Category
Article
ISSN
0008-6215

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✦ Synopsis

Single crystals of benzyl3,4-anhydro-2-O-mesyl-6-O-trityl-a-~-altropyranoside (1) were tetragonal, space group P4,, with cell dimensions a = l&393(3), b = 16.393(2), c = 11.952(2) A, Z = 4. The 3,4_anhydropyranose ring adopts a half-chair ('Ho) conformation. The conformations of 3,4-anhydro-a-Dhexopyranosides with the allo, attro. galacto, and taio configurations are discussed.

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