C. Lescop et al., Stereoselective synthesis of a [3.3.0]-fused gamma-butyrolactone. Application in the preparation of bicyclic nucleosides, TETRAHEDR L, 41(17), 2000, pp. 3057-3060
Stereoselective rearrangement of 6,7-epoxy-3-oxabicyclo[3.2.0]heptan-2-ones
2 and 3 in water afforded a cis-fused butyrolactone as a mixture of two ep
imers 1a-b. These were used as the starting materials to prepare new bicycl
onucleosides 8a-b. (C) 2000 Elsevier Science Ltd. All rights reserved.