Preparation and Storage of the Catalyst. Pdc was prepared from NaH (60 mmol), t-AmOH (20 mmol), and Pd(OAc)z (10 mmol) in THF (50 mL) following the procedure previously re- ported for the preparation of Nic." Addition of t-AmOH was started at 40 "C as it was very important not to exceed 45 "C during either step of the preparation. After 3 h of stirring at 45 "C, the catalyst was ready for use. It was syringed and stored under argon in air-tight bottles in which was ...
