Potassium Carbonate → tert-butyl (2R,5S)-5-({[tert-butyl(dimethyl)silyl]oxy}methyl)-2-[(E)-2-(2-nitrophenyl)ethenyl]morpholine-4-carboxylate

関与物質

反応手順

To tert-butyl (2S,5S)-5-({[tert-butyl(dimethyl)silyl]oxy}methyl)-2-formylmorpholine-4-carboxylate (1 eq.) in DME (0.2 M) at rt were added (2-nitrobenzyl)(triphenyl)phosphonium bromide (1.1 eq.), potassium carbonate (2 eq.) and 18-C-6 (0.1 eq.). The reaction mixture was stirred at rt for 12 hrs, filtered on celite and the filtrate was concentrated under reduced pressure. The crude product was purified by automated SiO2 flash chromatography system using solvent gradient of 10% to 60% EtOAc/Hex to afford the desired compound

情報源と証拠