The extent of intramolecular hydrogen bonding between hydroxyl groups and ring oxygens, as determined by infra-red spectroscopy in the hydroxyl stretching region, in a series of monohydroxy derivatives of tetrahydropyran, tetrahydrofuran and 1:3-dioxan provides direct experimental evidence for the stabilities of different conformations of certain of the alcohols. The synthesis of tetrahydropyran-3-ol
both inhibit and prime GAG synthesis by acting as inhibitors or substrates for β4GalT7. In this report, we exploit hydroxylated oxanes as deoxygenated xyloside analogs to clarify the minimum protein-ligand interactions required for galactosylation and/or inhibition. Enantiomerically pure substances were synthesized using a chiral pool approach whereas the correspondingracemates were obtained from simple
Neighboring‐Group Participation by C‐2 Acyloxy Groups: Influence of the Nucleophile and Acyl Group on the Stereochemical Outcome of Acetal Substitution Reactions
作者:Yuge Chun、Wouter A. Remmerswaal、Jeroen D. C. Codée、K. A. Woerpel
DOI:10.1002/chem.202301894
日期:2023.10.13
Neighboring-group participation by C-2 acyloxy groups can control the 1,2-trans stereoselectivity of acetal substitution reactions with the employment of strong nucleophiles. 1,2-Trans selectivity increases with decreased electron-donating ability of the acyloxy groups at C-2.