Methyl chloroformate → HCID 70562147, compound

Participants

Reaction Steps

To a solution of compound N-(1-(3-(4-chlorophenyl)pent-1-yn-3-yl)-1H-indol-4-yl)-N-((2-(trimethylsilyl)ethoxy)methyl)methanesulfonamide (2.9 g, 5.6 mmol, enantiomer A), as described in Example 55 Step A, in dry THF (10 mL) was added BuLi (4.5 mL, 11.2 mmol, 2.5 M in hexane) at −78° C. After stirring for 30 min, methyl carbonchloridate (0.88 mL, 6.2 mmol) was added to the mixture at −78° C. The resulting mixture was stirred for another 2 h and then quenched with saturated NH4Cl (10 mL), extracted with ethyl acetate, washed with brine (50 mL), dried over sodium sulfate, then filtered. After removing the organic solvent, the residue was purified by column chromatography (EA/PE=1:10) to obtain the title compound. LC/MS m/z=597.0 [M+Na]+.

Provenance & Evidence