Ammonium Acetate → Ethyl (5R)-2-amino-5-methyl-1-cyclopentene-1-carboxylate

Participants

Reaction Steps

To a solution of (R)-ethyl 2-methyl-5-oxocyclopentanecarboxylate (106 g, 622 mmol) in 1.2 L MeOH was added ammonium acetate (240 g, 3.1 mol). The reaction was stirred for 20 hours and concentrated to remove MeOH. The resulting residue was dissolved in CH2Cl2, washed with H2O, brine, dried (Na2SO4), filtered and concentrated to give the title compound (102 g, 97% yield) as an orange oil.

Provenance & Evidence