Abstract
The inside cover picture shows a dehydrative glycosylation mediated by 2‐aryl‐1,3‐dithiane 1‐oxides. Upon activation of the sulfoxide of the reagent with Tf2O, a temporary leaving group is installed on 1‐OH sugar, which undergoes a comproportionation reaction to deliver the oxocarbenium ion, thus facilitates the glycosylation reaction. In the picture, the ring formed by two great egrets represents the important cyclic 1,3‐dithiane 1‐oxides dehydrative reagent. This picture was captured in Xiangshan town, Nanchang, Jiangxi Province of China by Mr. Yuguo Chen. More details are discussed in the article by Wan et al. on page 43—49. image
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