4-Fluorobenzaldehyde → (+/-)-(E)-3-{1'-(4-Fluoro-benzyl)-3,4-dihydro-4-oxo-spiro[2H-(1,3)-benzoxazine-2,3'-piperidin]-6-yl}-acrylic acid methyl ester

Participants

Reaction Steps

(±)-(E)-3-{1′-(4-Fluoro-benzyl)-3,4-dihydro-4-oxo-spiro[2H-(1,3)-benzoxazine-2,3′-piperidin]-6-yl}-acrylic acid methyl ester was synthesized starting from Intermediate 5 (339 mg, 1.00 mmol), according to the procedure described in Example 40, Step A, using 4-fluorobenzaldehyde (0.13 ml, 1.2 mmol) and NaBH3CN (76 mg, 1.2 mmol). The product was obtained as a white solid (320 mg).

Provenance & Evidence