HCID 87383945, compound → HCID 67395241, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of (S,E)-tert-butyl 5-((tert-butylsulfinylimino)methyl)-1-methyl-1H-pyrrole-3-carboxylate (3.0 g, 10 mmol) in DCM (60 mL) was slowly added methylmagnesium bromide (13.3 mL, 3.0 M in ether) at −78° C. After stirring at −78° C. for 1 h, the solution was warmed to rt and stirred for 2 h. The reaction was quenched with sat. NH4Cl solution. After separation, the organic phase was washed with brine (5 mL), dried (Na2SO4) and concentrated. Flash column chromatography (petroleum ether: EtOAc, 10:1 to 1:1) afforded tert-butyl 5-((R)-1-((S)-1,1-dimethylethylsulfinamido)ethyl)-1-methyl-1H-pyrrole-3-carboxylate (2.2 g, 70%). 1H NMR (CDCl3, 400 MHz) δ 7.15 (s, 1H), 6.47 (s, 1H), 4.48 (m, 1H), 3.62 (s, 3H), 3.18 (m, 1H), 1.68 (d, J=6.6 Hz, 3H), 1.52 (s, 9H), 1.19 (s, 9H).

Provenance & Evidence