Reaction of acetyl hypofluorite with pyranoid and furanoid glycals
作者:Karl Dax、Brigitte I. Glänzer、Gerhard Schulz、Hermann Vyplel
DOI:10.1016/0008-6215(87)80196-9
日期:1987.4
Abstract The regiospecific syn -addition of acetyl hypofluorite to glycals derived from pentopyranoses led to mixtures of stereoisomers. Stereospecific reactions occurred with furanoid glycals, the direction of addition being governed by the nature of the substituent at C-3. Whereas a benzyloxy group caused attack from the opposite, less-hindered face of the double bond, a hydroxyl group induced addition
Capozzi, Giuseppe; Dios, Angeles; Franck, Richard W., Angewandte Chemie, 1996, vol. 108, # 7, p. 805 - 807
作者:Capozzi, Giuseppe、Dios, Angeles、Franck, Richard W.、Geer, Aloma、Marzabadi, Cecilia、et al.
DOI:——
日期:——
Novel Heterocycloaddition Reaction of Glycals
作者:Angeles Dios、Aloma Geer、Cecilia H. Marzabadi、Richard W. Franck
DOI:10.1021/jo981047u
日期:1998.9.1
Diacyl thione species 1 has been generated and reacted in situ with both pyranoid and furanoid glycals to form novel [4 + 2] cycloadducts. Factors such as protecting groups and configuration of substituents in the glycals along with medium effects were varied to discover influences on face selectivity and reactivity. A qualitative correlation of reactivity with the HOMO-LUMO gap between the glycal (HOMO) and the heterodienic species (LUMO) is observed. In one example, the isolation of byproducts suggests that the cycloaddition may in fact be stepwise.