P. Magnus et al., NEW STRATEGY FOR THE SYNTHESIS OF THE TAXANE DITERPENES - FORMATION OF THE A-RING AND INTRODUCTION OF THE C-1 HYDROXYL GROUP, Tetrahedron letters, 36(30), 1995, pp. 5331-5334
The A-ring of the taxanes is conveniently made from an ester-sulfone c
ondensation, and is compatible with the 1-hydroxyl group, thus complet
ing the synthesis of the ABC-rings.