EP2340252A1 - A PROCESS FOR PREPARING [1S- ]1-ALPHA, 2-ALPHA, 3-BETA (1S*, 2R*) 5-BETA] ]-3- [7- [2- (3, 4-DIF LUOROPHENYL) -CYCLOPROPYLAMINO]- 5- (PROPYLTHIO) -3H-1, 2, 3-TRIAZOLO [4, 5-D]PYRIMIDIN-3-YL]-5- (2- HYDROXYETHOXY) CYCLOPENTANE-1, 2-DIOL AND TO ITS INTERMEDIATES