Fig. 5. Results of catalytic hydrogenation with 3.

[a] Typical conditions: 5 mmol substrate, complex 3 (50 p.p.m.), KBHEt₃ (1 mol%) in 1,4-dioxane (3 mL), 120 °C, P = 25 bar H₂, 24 h. Yields determined by GC-FID with dodecane internal standard. [b] Isolated yields. [c] Reactions carried out in isopropanol (3 mL) at 80 °C instead. [d] The product was corresponding isopropyl ester identified by NMR. [e] 100 p.p.m. of 3 used in isopropanol (3 mL), 120 °C. [f] 200 p.p.m. of 3 used.