Potassium Fluoride → HCID 16035518, compound

Participants

Reaction Conditions

Reaction Steps

N′-(3-chloro-5-oxo-5H-benzo[4,5]cyclohepta[1,2-b]pyridin-7-yl)-N-methyl-N-(tetrahydrofuran-3-yl)sulfamide Enantiomer B (0.070 g, 0.17 mmol), 1-methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (0.069 g, 0.33 mmol), Pd2(dba)3 (0.008 g, 0.0085 mmol), (tBu3)PBF4 (0.005 g, 0.017 mmol) and potassium fluoride (0.032 g, 0.56 mmol) were combined in a dry tube. 1.0 mL dry DMF was added and argon was bubbled through the solution for five minutes. The tube was sealed and heated in a Biotage Initiator series microwave reactor to 100° C. for 30 minutes. The solution was diluted with ethyl acetate and washed with saturated sodium bicarbonate. The organic layer was dried with magnesium sulfate, filtered, concentrated in vacuo, and purified by HPLC chromatography (20-100% acetonitrile/water gradient, 0.05% trifluoroacetic acid modifier) to afford the crude compound. The crude material was purified by silica chromatography (0-100% ethyl acetate/hexanes gradient, followed by 0-20% methanol/dichloromethane gradient). The isolated material was dissolved in minimal 25% methano/dichloromethane and hexanes were added until precipitation occurred. Precipitate was filtered to afford title compound. 1H NMR (600 MHz, D6-DMSO) □ 10.55 (s, 1H); 9.20 (d, 1H); 8.58 (d, 1H); 8.46 (s, 1H); 8.13 (s, 1H); 7.95 (d, 1H); 7.75 (d, 1H); 7.52 (dd, 1H); 7.32 (d, 1H); 7.22 (d, 1H); 4.48-4.53 (m, 1H); 3.88 (s, 3H); 3.74-3.80 (m, 1H); 3.42-3.54 (m, 3H); 2.68 (s, 3H); 1.93-2.00 (m, 1H); 1.65-1.72 (m, 1H). LRMS (APCI) calc'd for (C23H24N5O4S) [M+H]+, 466.2; found, 466.2.

Provenance & Evidence