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[4+2] Cycloaddition Reaction of Cyclic Alkyne–{Co2(CO)6} Complexes with Dienes

✍ Scribed by Prof. Dr. Nobuharu Iwasawa; Isao Ooi; Dr. Kennichi Inaba; Dr. Jun Takaya


Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
318 KB
Volume
49
Category
Article
ISSN
0044-8249

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New Glycosylation Reaction Based on Alkyne-Co2(CO)6 Complex. -Fully protected glycopyranosides (I), bearing a 4-glycosyl-6-phenyl-5hexynoate residue, react with Co2(CO)8 to an alkyne-Co2(CO)6 complex. On exposure to TmsOTf it provides glucosylglucosides (III) via internal delivery of glycosyl accep