HCID 86675871, compound → HCID 71225351, compound

Participants

Reaction Steps

A stirred solution of (S)-1-{(S)-3-[3-(tert-butyl-dimethyl-silanyloxy)-phenyl]-2-[(S)-2-((R)-3-methoxy-hept-6-enoylamino)-3-methyl-butyrylamino]-propionyl}-hexahydro-pyridazine-3-carboxylic acid (R)-1-(3-vinyl-phenyl)-ethyl ester (123 mg, 0.158 mmol) and Hoveyda-Grubbs 2nd generation catalyst (10 mg, 0.0158 mmol) in 1,2-dichloroethane (60 mL) was heated at 80° C. for 1.5 hours. The reaction mixture was cooled before adding silica gel. The mixture was evaporated then purified by silica gel chromatography using ethyl acetate to give the title compound (54 mg, 46%) as a pale brown solid. 1H NMR (300 MHz, CDCl3) δ 0.16 (s, 6H), 0.80-1.00 (m, 17H), 1.34-1.94 (m, 12H), 2.00-2.20 (m, 5H), 2.34-2.53 (m, 3H), 2.63-3.03 (m, 3H), 3.38 (s, 3H), 3.52-3.70 (m, 2H), 4.27-4.38 (m, 2H), 4.92-5.10 (m, 2H), 5.29 (d, J=10.9 Hz, 1H), 5.64-5.98 (m, 2H), 6.52-6.99 (m, 4H), 7.22-7.42 (m, 2H). LCMS (m/z) 749.3 [M+H] Tr=5.91 min.

Provenance & Evidence