(2S,5R)-tert-butyl 5-(N-(allyloxy)-2-nitrophenylsulfonamido)-2-carbamoyl-4-methyl-5,6-dihydropyridine-1(2H)-carboxylate → (2S,5R)-tert-butyl 5-(N-(allyloxy)-2-nitrophenylsulfonamido)-2-carbamoyl-3-ethyl-5,6-dihydropyridine-1(2H)-carboxylate

Participants

Reaction Steps

The title compound was prepared from (2S,5R)-5-(N-(allyloxy)-2-nitrophenylsulfonamido)-1-(tert-butoxycarbonyl)-3-ethyl-1,2,5,6-tetrahydropyridine-2-carboxylic acid (Intermediate 211, 1.89 g, 3.69 mmol) following the procedure described for Intermediate 20. Silica gel chromatography (0%-80% ethyl acetate/hexanes) afforded the title compound (1.445 g, 77%) as a beige foam.

Provenance & Evidence