Potassium Phosphate, Tribasic → HCID 59752684, compound

Participants

Reaction Steps

1-(4-Chloro-benzyl)-3-(4-chloro-phenyl)-4,5,7,8-tetrahydro-1H-1,2,6-triaza-azulene-6-carboxylic acid tert-butyl ester. To a solution of 142.7 mg of 1-(4-chloro-benzyl)-3-trifluoromethanesulfonyl-4,5,7,8-tetrahydro-1H-1,2,6-triaza-azulene-6-carboxylic acid tert-butyl ester, prepared as in Example 43, Steps A through C, in 3 mL of THF was added 0.17 g of K3PO4, 54.9 mg of 4-chlorophenylboronic acid, and 22.1 mg of PdCl2dppf. The mixture was heated at reflux for 48 h. The mixture was filtered through diatomaceous earth, rinsing with toluene, and the filtrate was concentrated in vacuo. Chromatography on SiO2 (hexanes to 75% EtOAc/hexanes) afforded 6.7 mg of the desired compound. MS (ESI): exact mass calculated for C25H27Cl2N3O2, 471.15; found, m/z 472.1 [M+H]+.

Provenance & Evidence