Triethylamine → HCID 69357120, compound

Participants

Reaction Steps

To a solution of methyl 4-{bis[(3-chloropropyl)sulfonyl]amino}-1-ethyl-1H-indazole-6-carboxylate (D237) (1.5 g, 3 mmol, 1 equiv) in EtOH (20 ml) was added NEt3 (920 μl, 6.6 mmol, 2.2 equiv) and the resulting solution was refluxed for 3 h then cooled to room temperature and concentrated in vacuo. The residue was dissolved in AcOEt and the organic phase was washed with a 2N aqueous HCl solution, dried over MgSO4 and concentrated in vacuo. The residue was triturated with AcOEt/iso-hexane to give methyl 4-(1,1-dioxido-2-isothiazolidinyl)-1-ethyl-1H-indazole-6-carboxylate (B153) as a light brown solid which was used in the next step without further purification. [M+H]+=324.5, RT=2.35 min.

Provenance & Evidence