1-[(2-methyl-5,8-dihydro-4-quinolinyl)methyl]-1H-indole-5-carbonyl chloride → 1-tert-butyl 3-methyl 4-[({1-[(2-methyl-4-quinolinyl)methyl]-1H-indol-5-yl}carbonyl)amino]-1,3-pyrrolidinedicarboxylate

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Reaction Steps

The 1-tert-butyl 3-methyl 4-amino-1,3-pyrrolidinedicarboxylate (0.10 g, 0.41 mmol) was combined with the acid chloride from step (501b) (0.10 g, 0.32 mmol) in methylene chloride (15 mL) and water saturated sodium bicarbonate (15 mL). The reaction was stirred for 3.5 h, partitioned between methylene chloride and water. The organic layer was washed with brine, dried over magnesium sulfate and concentrated to give a solid. This was purified by flash chromatography on silica gel eluting hexane: ethyl acetate (30:60, v:v) to give the 1-tert-butyl 3-methyl 4-[({1-[(2-methyl-4-quinolinyl)methyl]-1H-indol-5-yl}carbonyl)amino]-1,3-pyrrolidinedicarboxylate (0.120 g, 70%) as a solid, MS (M+H)+=543.

Provenance & Evidence