Stannane, tributyl(1-ethoxyethenyl)- → 2-(1-ethoxyvinyl)-5-phenyl-N-(pyridin-2-ylmethyl)quinazolin-4-amine

Participants

Reaction Conditions

Reaction Steps

To 2-chloro-5-phenyl-N-(pyridin-2-ylmethyl)quinazolin-4-amine (1.0 g, 2.88 mmol) was added 1,4-dioxane (15 mL) and the resulting solution degassed with nitrogen. Pd(TPP)2Cl2 (0.202 g, 0.288 mmol) and tributyl(1-ethoxyvinyl)stannane (5.2 g, 14 mmol) were added under a nitrogen stream and the reaction mixture was heated to 90° C. where it stirred for 16 h. After this time, the reaction mixture was allowed to cool to room temperature. Once at the prescribed temperature, the reaction mixture was concentrated under reduced pressure and the resulting residue was purified by neutral alumina column chromatography (20% ethyl acetate, hexane) to yield 2-(1-ethoxyvinyl)-5-phenyl-N-(pyridin-2-ylmethyl)quinazolin-4-amine (940 mg, 85% yield) as a white solid. 1H NMR (400 MHz, DMSO-d6) δ (ppm): 8.23 (d, 1H, J=4.4 Hz), 7.75-7.85 (m, 2H), 7.70 (dt, 1H, J=2, 7.6 Hz), 7.45-7.58 (m, 5H), 7.20-7.30 (m, 3H), 6.61 (br s, 1H), 4.61 (s, 1H), 4.60 (d, 2H, J=4 Hz), 3.94 (q, 2H, J=6.8 Hz), 1.40 (t, 3H, J=6.8 Hz). LCMS Method Y: retention time 1.952 min, [M+1]=383.2.

Provenance & Evidence