R. Benhida et al., Efficient stereoselective synthesis of new C-nucleosides via intramolecular Mitsunobu cyclization, NUCLEOS NUC, 18(4-5), 1999, pp. 603-604
We have studied the stereoselective synthesis of new C-nucleosides by heter
oarylation of the protected gamma-ribonolactone by means of heteroaromatic
systems such as indole, thiazoles, imidazoles and benzimidazoles. We have o
bserved that the first anion addition-limiting step is very sensitive to st
eric factors induced by the N-protective groups in a-position.