Isopropyl isocyanate → HCID 59656392, compound

Participants

Reaction Steps

(±)-(cis)-1-Butyryl-4-[4-(2-methyl-benzoylamino)-naphthalene-1-sulfonylamino]-piperidine-3-carboxylic acid ethyl ester was made following general procedure in Scheme 5, substituting (±)-4-amino-1-benzyl-piperidine-3-carboxylic acid ethyl ester (5) for 4-amino-piperidine-1-carboxylic acid tert-butyl ester and substituting butyl chloride for 2-isocyanato-propane. To the solution of (±)-(cis)-1-butyryl-4-[4-(2-methyl-benzoylamino)-naphthalene-1-sulfonylamino]-piperidine-3-carboxylic acid ethyl ester (48 mg, 0.085 mmol) in THF (5 mL), was added lithium borohydride in THF solution (0.5 mL, 0.25 mmol) and the resultant solution was stired at 0° C. for 2 h. The solvent was removed in vacuo and the crude material was purified by HPLC to give the title compound. 1H NMR (300 MHz, MeOD) δ 8.81 (d, 1H), 8.34 (d, 1H), 8.25 (d, 1H), 7.95 (d, 1H), 7.72 (m, 3H), 7.40 (m, 3H), 3.46 (m, 7H), 2.56 (s, 3H), 2.32 (m, 2H), 2.55 (s, 3H), 1.52 (m, 5H), 0.92 (m, 3H); LC/MS m/z 525 (M+H)+.

Provenance & Evidence