Methane → HCID 58092731, compound

Participants

Reaction Steps

Trimethylaluminum in toluene (2 M, 2.89 mmol) was added dropwise to a mixture of NH4Cl (2.89 mmol) in toluene (3 mL) at 0° C. with the formation of methane gas. The reaction mixture was allowed to warm to rt, stirred for a further 15 min and then slowly treated with a solution of (2S,3S)-3-morpholin-4-ylmethyl-1-((S)-1-phenyl-ethyl)-pyrrolidine-2-carboxylic acid methyl ester (Stage 37.3) (1.444 mmol) in toluene (9 mL). Additional reagent prepared from NH4Cl (2.89 mmol) in toluene (2 mL) and trimethylaluminum in toluene (2 M, 2.89 mmol) at 0° C. was added after 18 h. After stirring for 60 h, the mixture was cooled to 0° C., quenched with 1M HCl and then washed with CH2Cl2 (3×). The aqueous phase was basified with a 1:1 saturated solution of NaHCO3/saturated solution of Rochelle's salt and extracted with THF (10×). The combined organic layers were dried (Na2SO4), filtered and concentrated. The residue was purified by silica gel column chromatography to afford the title compound as a yellow oil. HPLC: tR=2.18 min (method G); ESI-MS: [M+H]+ 318.

Provenance & Evidence