Benzoclidine → HCID 131727932, compound

Participants

Reaction Steps

(+/−)-3-Quinuclidinol benzoate (Sigma, 17.9 g, 77.5 mmol) was treated with L-tartaric acid (Aldrich, 99% ee, 11.63 g, 77.5 mmol) in EtOH (80%, 222 mL) at ambient temperature for 1 week. The white solid was filtered off and dried under reduced pressure. 6.5 g of 3-(R)-quinuclidinol benzoate·(L)-tartrate was obtained with ˜80% ee (assayed by HPLC. HPLC conditions: chiralpak AD column 25 cm×4 mm ID. solvent, EtOH:hexanes=15:85. flow rate, 1 mL/min. uv, 220 nm. Retention time: (S)-3-quinuclidinol benzoate, 7.87 min; (R)-3-quinuclidinol benzoate 13.3 min.) Recrystallization of the above solid in EtOH (80%, 35 mL) gave the title product (4.5 g, yield, 15%, >98% ee). MS (DCI/NH3) m/z 232 (M+H)+.

Provenance & Evidence