Reaction of methyl diazoacetate with 23 -isopropylidene-D-glyceraldehyde. Stereoselectivity in the synthesis of 2-deoxy-D-aldonates and 2-deoxy-γD-aldonolactones.
作者:Fidel J. López-Herrera、María Valpuesta-Fernández、Salvador Garciá-Claros
DOI:10.1016/s0040-4020(01)87898-4
日期:1990.1
The reaction of 23-O-isopropylidene-D-glyceraldehyde with diazoacetates are revised. In the absence of catalyst the methyl (3S 4R) and (3R 4R)-45-O-isopropylidene- 2-diazo-345-trihydroxypentanoate (4a and 4b) were the new and main products in a high stereoselectivereaction (84:16). These products were easily converted into the corresponding 2-deoxy-3-ulosonates (3) 2-deoxyγ-aldonates (67 and 8) and
The chemistry of O-silylated ketene acetals; diastereoselective Aldol reaction of 2,3-O-isopropylidene-D (and L)-glyceraldehydes leading to 2-deoxy-D (and L)-riboses
作者:Yasuyuki Kita、Hitoshi Yasuda、Osamu Tamura、Fumio Itoh、Yuan Ke Ya、Yasumitsu Tamura
DOI:10.1016/s0040-4039(00)98924-x
日期:——
Diastereoselective carbon-carbon bond forming reaction of 2,3-O-isopropylidene-D (and L)-glyceraldehydes (D and L-2) with ketene silyl acetals (1a,b) occurred in acetonitrile under mild conditions to give the corresponding anti-β-siloxyesters (D and L-3a) as major products, which could be converted through a few additional steps to 2-deoxy-D(and L)-riboses.