Sodium Carbonate → HCID 67994760, compound

Participants

Reaction Conditions

Reaction Steps

A stirred mixture of methyl 1-chloro-4-cyano-5H-pyrido[4,3-b]indole-7-carboxylate (0.285 g, 0.998 mmol), 3-(2-methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)quinazolin-4(3H)-one (0.361 g, 0.998 mmol), Tetrakis(triphenylphosphine)palladium(0) (0.058 g, 0.050 mmol) and Sodium carbonate[2M] (0.499 mL, 0.998 mmol) in Dioxane (2 mL) was heated at 110° C. for 16 hours overnight. LC-MS showed complete conversion to the desired product mass plus residual starting material[boronic ester] and a byproduct. The reaction mixture was concentrated. The residue was taken up in 10 ml DMF, stirred and filtered. The filtrate was concentrated; the residue triturated with methanol and filtered. The solid residue was dried overnight. LC-MS showed the solid residue to be the desired product methyl-4-cyano-1-(2-methyl-3-(4-oxoquinazolin-3(4H)-yl)phenyl)-5H-pyrido[4,3-b]indole-7-carboxylate as a tan solid [0.192 g, 0.395 mmol, 39% yield]. The product had an HPLC Retention Time=3.521 min [mixture of rotamers][4 min grad, 10% MeOH/water to 90% MeOH/water, 0.1% TFA, YMC COMBISCREEN® ODS-A, 4.6×50 mm, 220 nM]; LC/MS+1 486.2

Provenance & Evidence