Chloride → HCID 45115680, compound

Participants

Reaction Steps

Analogously to Example 4, 0.52 g (2.85 mmol) of tert-butyl pyrazinecarboxylate (prepared according to Example 2), 25.3 mg (54 μmol) of bicyclo[2.2.1 ]hepta-2,5-dienerhodium(I) chloride dimer and 61.5 mg (113.3 μmol) of 1-[1(R)-(di-tert-butylphosphino)ethyl]-2(S)- (diphenylphosphino)ferrocene were hydrogenated for 20 hours in 10 ml of methanol at 70° C. and 50 bar. A conversion of 67 percent was determined by NMR. The ee value was determined by hydrolyzing the ester (see Example 8).

Provenance & Evidence