Pyrrolidine → HCID 14762160, compound

Participants

Reaction Steps

A solution of 6-methoxy-3,4-dihydro-1H-naphthalen-2-one (1) (5.64 g, 32 mmol) in methanol (60 mL) was treated with pyrrolidine (3.5 mL, 41.6 mmol) and the resultant mixture was stirred at ambient temperature for 1.5 h. The product precipitated from solution within minutes of the addition of pyrrolidine. The resultant suspension was cooled in an ice bath and the enamine product (2) was collected by filtration as a white solid (5.6 g, 76%). NMR (CDCl3): δ 1.86-1.94 (m, 4 H), 2.46 (t, 2H), 2.80 (t, 2 H), 3.19-3.25 (m, 4 H), 3.77 (s, 3 H), 5.10 (s, 1 H), 6.59-6.65 (m, 2 H) and 6.78 d, 1 H).

Provenance & Evidence