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Grauert M, Schöllkopf U. Asymmetric Synthesesvia Heterocyclic Intermediates, XXVII. Reactions of Metallated Bislactim Ethers of cyclo(-L-Val-Gly-) with (R)- and (S)-Glyceraldehyde and with (S)-Lactaldehyde. ACTA ACUST UNITED AC 1985. [DOI: 10.1002/jlac.198519850909] [Citation(s) in RCA: 54] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Zinner H, Wulf G. Derivate der Zucker-mercaptale, XL. Acetate, Benzoate und Isopropyliden-Verbindungen der 3-Desoxy-D-galaktose-dialkylmercaptale. ACTA ACUST UNITED AC 1969. [DOI: 10.1002/cber.19691020122] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Abstract
The acetonation of d-xylose diethyl dithioacetal yields the 2,3;4,5-di-O-isopropylidene derivative. Partial acetonation yields the 4,5-, 3,4-, 2,3-, and 2,4-O-isopropylidene derivatives, the structures of which have been proved. The acetonation of the 2,4-O-isopropylidene derivative gives the 2,4;3,5-di-O-isopropylidene derivative. New preparations of 2,3- and 2,5-di-O-methyl-d-xylose, and the preparation of crystalline methyl 2,3-di-O-methyl-α-d-xylofuranoside, are described.
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