Synthesis of a non-charged analogue of guanosyldiphosphofucose
摘要:
Methylene sulfonoamide is used as a non-charged surrogate of the diphosphate moiety to prepare an analogue of the fucosyl donor guanosyldiphosphofucose of potential use as inhibitor of fucosyltransferases. (C) 2001 Published by Elsevier Science Ltd.
Synthesis of a non-charged analogue of guanosyldiphosphofucose
摘要:
Methylene sulfonoamide is used as a non-charged surrogate of the diphosphate moiety to prepare an analogue of the fucosyl donor guanosyldiphosphofucose of potential use as inhibitor of fucosyltransferases. (C) 2001 Published by Elsevier Science Ltd.
Dichloromethylenation of Lactones. 6. Efficient Synthesis of Dichloroolefins from Lactones and Acetates Using Triphenylphosphine and Tetrachloromethane
作者:Mohamed Lakhrissi、Yves Chapleur
DOI:10.1021/jo00098a039
日期:1994.9
Triphenylphosphine and tetrachloromethane react cleanly in refluxing tetrahydrofuran with substituted gamma and delta-lactones and some esters to afford the corresponding dichloroolefins in good yields. This new Wittig-type reaction provides an easy entry to this new class of compounds and tolerates a large variety of protecting groups. Application of this methodology to the dichloroolefination of simple lactones, sugar-derived lactones, and other biologically significant lactones is described.