(1S, 4R, 5S, 6S)-5-exo, 6-exo-(Isopropylidenedioxy)-7-oxabicyclo[2.2.1]heptan-2-one ((−)-1) was transformed with high stereoselectivity to L-allose. Similarly, enantiomer (+)-1 was transformed into L-talose. The ketones (+)-1 and (−)-1 were derived from furan and 1-cyanovinyl (1S)-camphanate and 1-cyanovinyl (1R)-camphanate, respectively.
将(1 S,4 R,5 S,6 S)-5- exo,6- exo-(异
丙二烯二氧基)-7-氧杂双环[2.2.1]庚-2--2-((-)- 1)转化为高对
L-阿洛糖的立体选择性。类似地,对映异构体(+)- 1被转化为L-塔洛糖。酮(+1)-1和(-1)-1分别来自
呋喃和
1-氰基乙烯基(1S)-
樟脑酸酯和
1-氰基乙烯基(1R)-
樟脑酸酯。