反应详情

The batch 1 D-tartrate of (208), was reconverted to the free base (a necessary part of the chiral assay procedure) using the procedure given above (to give 3.49 g), and the D-tartrate formation procedure was repeated as described to give the batch 2 salt of (208), 4.41 g (92% from D-tartaric acid) (chiral LC: 1.7% at 8.34 min and 96.22% at 8.98 min=96.5% ee after preparative derivatisation as the tert-butylurea (208)).

1. customgiven above (to give 3.49 g)