Ammonia → 1-(2-{2-[(3E)-4-(4-{[3-(beta-D-glucopyranosyloxy)-5-(propan-2-yl)-1H-pyrazol-4-yl]methyl}-3-methylphenyl)but-3-en-1-yl]-2,9-diazaspiro[5.5]undec-9-yl}-2-oxoethyl)-3-(2-methylpropyl)urea

Participants

Reaction Conditions

Reaction Steps

A mixture of 4-(4-{(1E)-4-[9-(aminoacetyl)-2,9-diazaspiro[5.5]undec-2-yl]but-1-en-1-yl]-2-methylbenzyl}-5-(propan-2-yl)-1H-pyrazol-3-yl 2,3,4,6-tetra-O-acetyl-beta-D-glucopyranoside dihydrochloride (11.70 g; 13.04 mmoles) in dichloromethane (33 mL) and diisopropylethylamine (13.65 mL; 78.27 mmoles) is stirred for 10 minutes to dissolve. The mixture is cooled to 5° C. and isobutyl isocyanate (2.59 g, 26.09 mmoles) is added dropwise over 5 minutes. When the addition is complete the cooling bath was removed. After 15 minutes, the mixture is concentrated under reduced pressure. The residue is treated with ammonia (2M in methanol; 35.00 mL, 70.00 mmoles) and stirred at ambient temperature for 1.5 hours. Further ammonia (2M in methanol; 35.00 mL, 70.00 mmoles) is added and the reaction is stirred overnight. The mixture is warmed to 40° C. and ammonia (2M in methanol; 35.00 mL, 70.00 mmoles) is added. The mixture is stirred for 160 minutes, and then concentrated. The residue is purified by reverse phase (C18) flash column chromatography eluting with 20:80 to 80:20 10 mM ammonium bicarbonate in water:acetonitrile to give the title compound (6.686 g, 68% yield). Mass spectrum (m/z): 755.5 (M+1).

Provenance & Evidence