Methanol → HCID 67089447, compound

Participants

Reaction Steps

(2S,3S,E)-2-(tert-Butoxycarbonyl)-3-(4-(trifluoromethyl)phenyl)hex-4-enoic acid (5.3 g, 14 mmol) was taken up in 70 mL of 3.5:1 benzene:MeOH. TMS diazomethane, (2M in hexane)(7.8 mL, 16 mmol) was added slowly to the mixture. Bubbling ensued. Approximately 2 mL excess of the TMS diazomethane reagent was added, presumably due to loss of titer of the reagent. The bubbling was monitored, and the addition was stopped when the bubbling ceased. The solvent was removed under reduced pressure. The mixture was triturated twice with 50 mL of 10% ether:hexanes, affording (2S,3S,E)-methyl 2-(tert-butoxycarbonyl)-3-(4-(trifluoromethyl)phenyl)hex-4-enoate (5.4 g, 98% yield) as a white solid. 1H NMR (400 MHz, CDCl3) δ ppm 7.59 (d, J=8.22 Hz, 2H) 7.34 (d, J=8.22 Hz, 2H) 5.75-5.59 (m, 2H) 4.92-4.84 (m, 1H) 4.70-4.63 (m, 1H) 3.78-3.72 (m, 1H) 3.68 (s, 3H) 1.72 (d, J=5.28 Hz, 3H) 1.37 (s, 9H).

Provenance & Evidence