Methyl iodide → tert-butyl 5-{[2-(1-methyl-1H-1,2,4-triazol-3-yl)phenyl]carbonyl}hexahydropyrrolo[3,4-c]pyrrole-2(1H)-carboxylate

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Reaction Steps

To a heterogeneous mixture of NaH (60% dispersion in mineral oil, 80 mg, 2 mmol) in DMF (4 mL) was added Intermediate 59 (641 mg, 1.67 mmol) in DMF (4 mL). 30 min after gas evolution had ceased methyliodide (0.115 mL, 1.84 mmol) was added dropwise. The mixture was diluted with H2O and extracted with EtOAc. The combined organic extracts were dried over Na2SO4, filtered and concentrated in vacuo. Chromatography (DCM to 8% 2 M NH3 in MeOH/DCM) afforded two products, tert-butyl 5-{[2-(1-methyl-1H-1,2,4-triazol-5-yl)phenyl]carbonyl}hexahydropyrrolo[3,4-c]pyrrole-2(1H)-carboxylate (120 mg, 18%) and tert-butyl 5-{[2-(1-methyl-1H-1,2,4-triazol-3-yl)phenyl]carbonyl}hexahydropyrrolo[3,4-c]pyrrole-2(1H)-carboxylate (454 mg, 68%) due to the tautomeric nature of the 1,2,4-triazole moiety. MS (ESI): mass calculated for C21H27N5O3, 397.21, m/z found 398.2 [M+1]+. 1H NMR (500 MHz, CDCl3): 7.90 (s, 1H), 7.61-7.41 (m, 4H), 3.83 (s, 3H), 3.74-3.36 (m, 5H), 3.29-3.12 (m, 3H), 2.88-2.75 (m, 2H), 1.47 (s, 9H).

Provenance & Evidence