Method for azide displacement of alpha-triflates of...

Details Method for azide displacement of alpha-triflates of... Method for azide displacement of alpha-triflates of...

C - Chemistry, Metallurgy

07

D

260/352.9

C07D 493/04 (2006.01) C07D 487/04 (2006.01) C07D 491/22 (2006.01) C07F 7/18 (2006.01)

Patent

CA 2024844

07-27(680)A METHOD FOR AZIDE DISPLACEMENT OF .alpha.-TRIFLATES OF 1,5-LACTONES Abstract of the Disclosure Reactions of azide ion with 2-O-trifluoro- methanesulphonates of both 3,4:6,7-di-O-isopropyl- idene-D-glycero-D-talo-heptono-1,5-lactone and of 3,4:6,7-di-O-isopropylidene-D-glycero-D-galacto- heptono-1,5-lactone are disclosed to give predominantly 2-azido-2-deoxy-3,4:6,7-di-O- isopropylidene-D-glycero-D-galacto-heptono-1,5- lactone initially which then isomerizes under moderate reaction conditions to 2-azido-2-deoxy-3,4:6,7-di-O- isopropylidene-D-glycero-D-talo-heptono-1,5- lactone.

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