Glycal Derivatives
3.6
721
⊡ Scheme 35
⊡ Scheme 36
⊡ Scheme 37
In the case of the D-threo isomer 110, nitronate 111 was isolated under the same conditions,
while 3-nitroglycal 112 was isolated under conditions that included treatment with KF in the
presence of 18-crown-6-ether ( > Scheme 37).