Tetrahydrofuran → HCID 58465606, compound

Participants

Reaction Steps

A solution of N-(2-chloroethyl)-2-nitro-N-(prop-2-yn-1-yl)benzenesulfonamide (0.51 g, 1.69 mmol and ethyl diazoacetate (0.266 mL, 2.532 mmol) in benzene (2 mL) was heated in a microwave reactor at 140° C. for 1 hour. Upon cooling to room temperature, cesium carbonate (0.637 g, 1.95 mmol) along with tetrahydrofuran (1 mL) was added. The vial was again sealed and heated at 140° C. for 30 minutes in the microwave reactor. Upon cooling to room temperature, the solvents were then evaporated in vacuo and the residue obtained was partitioned between water (10 mL) and EtOAc (15 mL). The aqueous layer was washed with additional EtOAc (15 mL), the combined organic layers were dried over anhydrous MgSO4, concentrated and purified via silica chromatography (20-90% EtOAc/hexane) to afford Intermediate 16 as a semi solid (0.235 g, 37%). LC-MS: (FA) ES+381; 1H NMR (400 MHz, CDCl3) δ 8.07 (dd, J=7.5, 1.7 Hz, 1H), 7.79-7.67 (m, 3H), 6.63 (s, 1H), 4.64 (s, 2H), 4.41-4.31 (m, 4H), 3.92-3.89 (m, 2H), 1.37 (t, J=7.1 Hz, 3H).

Provenance & Evidence