Hydrochloric Acid → Methyl (4R)-4-[(7-methoxy-2-oxo-6-vinyl-1,2-dihydroquinolin-4-yl)oxy]-L-prolinate hydrochloride

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Reaction Steps

To the product from Step 3, 1-tert-butyl 2-methyl (2S,4R)-4-[(7-methoxy-2-oxo-6-vinyl-1,2-dihydroquinolin-4-yl)oxy]pyrrolidine-1,2-dicarboxylate (2.02 g, 4.54 mmol) was added HCl (4M in dioxane) (22.72 ml, 91 mmol) at r.t. After 1.5 h, the solvent was removed in vacuo. The residue was taken up in Et2O and the solvent was removed in vacuo to yield 1.73 (99%) g of the title compound as a tan solid. LRMS ESI+ (M+H)+ 345.4.

Provenance & Evidence