Iridoid glycoside, silyl ethers

Analogous to the hemiacetals, anomeric silyl ethers can also serve as glycosyl donors. Glycosyl silyl ethers were first used as glycosyl donors to glycosylate acetals of carbonyl compounds [537-540]. Thus, the iridoid glycoside 255 was obtained by glycosylation of the acetyl derivative... 

SCHEME 4.48 Synthesis of iridoid glycoside using silyl ether. 

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