Water → HCID 178451224, compound

Participants

Reaction Steps

In a test tube equipped with a septum, tert-butyl (2-nitro-4-trifluoromethyl-phenylamino)-acetate (Starting material 5-VIII, 80 mg, 0.25 mmol) is dissolved in dry THF (0.5 ml). Argon is allowed to bubble through this solution for 10 min. Then dry palladium on carbon (10% w/w, 26 mg, 10% mol) is added and the flask is set under H2 atmosphere. The resulting mixture is shaken vigorously at rt overnight. If necessary, another 8% mol of palladium on charcoal 10% w/w is added and the resulting suspension is stirred for another hour under H2 atmosphere. The crude mixture is then filtered over celite to remove any solid particle. The celite is rinsed once with dry THF. To the resulting light yellow solution is added, under argon, 1,1′-thiocarbonyldiimidazole (89 mg, 0.5 mmol, 2 eq.). The resulting orange solution is allowed to stir at rt for 5 h. Water is then added. The yellow solid formed is filtered over a fritted funnel, rinsed thoroughly with water and dried under high vacuum. This yields the title compound (60 mg) in 73% as a yellow solid: tR=1.10 min (LC-3), ESI-MS (pos.): m/z 332.99 [M+H]+, 331.13 [M−H]+; 1H-NMR (DMSO-d6): δ (ppm) 1.41 (s, 9H, tBu), 5.06 (s, 2H, NHCH2CO2), 7.44 (s, 1H, Harom), 7.57 (s, 2H, Harom), 13.25 (br. s, 1H, SH).

Provenance & Evidence