4-Methylmorpholine → HCID 53240755, compound

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Reaction Steps

A mixture of (1R,10R,11S,16S)-1,11,15,15-tetramethyl-8,8-dioxo-8λ6-thiatetracyclo[8.8.0.02,7.011,16]octadeca-2,4,6-triene-3,5-dicarboxylic acid (85) (0.07 g, 0.2 mmol), HATU (0.25 g, 0.65 mmol) and 4-methylmorpholine (0.07 mL, 1 mmol) in THF (10 mL) and DMF (2.0 mL) was stirred at room temperature for 18 h in a sealed vessel. The mixture was concentrated under reduced pressure and the residue was triturated with water. The resulting solid was collected by filtration to give (1R,10R,11S,16S)-1,3-N,5-N,11,15,15-hexamethyl-8,8-dioxo-8λ6-thiatetracyclo[8.8.0.02,7.011,16]octadeca-2,4,6-triene-3,5-dicarboxamide (86) (0.035 g, 47%) as a white solid. 1H NMR (CD3OD): δ 8.38 (d, 1H), 7.88 (d, 1H), 3.54 (m, 2H), 2.90 (d, 6H), 2.67 (d, 1H), 2.18 (d, 1H), 1.90-1.48 (m, 9H), 1.46-1.14 (m, 3H), 1.06-0.93 (m, 4H), 0.90 (s, 3H), 0.87 (s, 3H). MS m/z 461 (C25H36N2O4S+H+).

Provenance & Evidence