Abstract
The reaction of sucrose with 1.1 mol. equiv. of tert-butyldiphenylsilyl ( t-BDPS) chloride in pyridine in the presence of 4-dimethylaminopyridine gave the crystalline 6′- t-BDPS ether 1 in 49% yield, without recourse to column chromatography. Compound 1 was transformed into the 4,6,1′-trichloride by using sulphuryl chloride. When the silylation reaction of sucrose was performed with 3 mol. equiv. of the reagent, chromatography gave the crystalline 6,6′-di- t-BDPS ether and the 6,1′,6′-tri- t-BDPS ether 9 in yields of 78 and 18.7%, respectively. Compound 9 was obtained as the major product on treatment of sucrose with 4.6 mol. equiv. of the silylating reagent. Removal of the silyl protecting-group in 6,6′-di- O- tert-butyl-diphenylsilylsucrose hexabenzoate, using tetrabutylammonium fluoride, proceeded smoothly, but with 4→6 migration of the benzoate.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
