Fachbereich Chemie, Universität Konstanz, Fach 725, 78457 Konstanz (Germany).
Angew Chem Int Ed Engl. 2013 Sep 16;52(38):10089-92. doi: 10.1002/anie.201302158. Epub 2013 Jul 26.
Thiourea mediates cooperative glycosidation through hydrogen bonding. N,N'-Diarylthiourea as cocatalyst enforces an SN2-type acid-catalyzed glycosidation even at room temperature (see scheme; Bn=benzyl). From O-(α-glycosyl) trichloroacetimidates as glycosyl donors and various acceptors, β-glycosides are preferentially or exclusively obtained.
硫脲通过氢键介导协同糖苷化。N,N'-二芳基硫脲作为共催化剂,即使在室温下也能促进 SN2 型酸催化的糖苷化反应(见方案;Bn=苄基)。从 O-(α-糖苷基)三氯乙酰亚胺酯作为糖基供体和各种受体,优先或专一地得到β-糖苷。