HCID 10944250, compound → HCID 86757171, compound

Participants

Reaction Steps

To a suspension of [3-(4-cyanophenyl)isoxazolin-5(R)-yl]acetic acid(500 mg, 2.17 mmol) in CH2Cl2 (20 ml) cooled in an ice-water bath was added a 1.6M solution of O-tert-butyl-N, N-diisopropylisourea, cat. CuCl(4 ml). The resulting mixture was stirred at rt for 48 hrs and then filted. The fitrate was concentrated and the residue dissolved in EtOAc. The EtOAc solution was washed with brine and then dried over Na2SO4. After concentration, the residue was chromatographed with a mixture of EtOAc and hexane to afford 600 mg of the product as a white solid(96%). 1H NMR(300 MHz, CDCl3) δ1.48(s, 9H), 2.60(dd, 1H), 2.60(dd, 1H), 3.16(dd, 1H), 3.52(dd, 1H), 5.169m, 1H0, 7.70(d, 2H), 7.78(d, 2H); MS(ESI) Calc. for (M−1)+: 285. Found: 285.

Provenance & Evidence