Glycosyl Disulfides: Novel Glycosylating Reagents with Flexible Aglycon Alteration
摘要:
Glycosyl disulfides have been shown for the first time to be effective glycosyl donors. Glucosylation and galactosylation of a panel of representative alcohol acceptors allowed the formation of 28simple glycosides, disaccharides, and glycoamino acids in yields of up to 90%. As well as providing a novel class of effective glycosyl donors, the ability to easily alter the nature of the aglycon and the ability to differently activate donors that differ only in their aglycon simply through altering conditions lends glycosyl disulfide donors to their use in latent-active reactivity tuning Strategies,.
Direct Dehydrative Glycosylation Catalyzed by Diphenylammonium Triflate
作者:Mei-Yuan Hsu、Sarah Lam、Chia-Hui Wu、Mei-Huei Lin、Su-Ching Lin、Cheng-Chung Wang
DOI:10.3390/molecules25051103
日期:——
dehydrative glycosylations of carbohydrate hemiacetals catalyzed by diphenylammonium triflate under microwave irradiation are described. Both armed and disarmed glycosyl-C1-hemiacetal donors were efficiently glycosylated in moderate to excellent yields without the need for any drying agents and stoichiometric additives. This method has been successfully applied to a solid-phase glycosylation.