Sodium Hydroxide → HCID 67071687, compound

Participants

Reaction Steps

(±)-(E)-3-[1′-Isopropyl-4-oxo-spiro(chromane-2,3′-piperidine)-6-yl]-acrylic acid methyl ester (234 mg, 0.681 mmol) was treated with 1 M NaOH according to the procedure described in Example 16 STEP B to give (±)-(E)-3-[1′-isopropyl-4-oxo-spiro(chromane-2,3′-piperidine)-6-yl]-acrylic acid. The acid was treated with NH2OTHP according to the procedure described in Example 16, Step C, giving (±)-(E)-3-[1′-isopropyl-4-oxo-spiro(chromane-2,3′-piperidine)-6-yl]-N-(tetrahydro-pyran-2-yloxy)-acrylamide. Removal of the THP protecting group following the procedure described in Example 16, Step C, gave (±)-(E)-3-[1′-isopropyl-4-oxo-spiro(chromane-2,3′-piperidine)-6-yl]-N-hydroxy-acrylamide hydrochloride as yellow powder (210 mg, 81% over three steps)

Provenance & Evidence