In the presence of the [Cp*IrCl2]2/NaOH system, the direct N-alkylation of 2-aminoquinazolines and 2-aminopyrimidines with alcohols afforded the N-exosubstituted 2-(N-alkylamino)quinazolines and 2-(N-alkylamino)pyrimidines with 71–96% yields and complete regioselectivities. The protocol is highly attractive because of easily available starting materials, high atom efficiency and environmental friendliness
Synthesis of 2-aminoquinazolines from<i>ortho</i>-fluorobenzaldehydes
作者:John B. Hynes、Johnny P. Campbell
DOI:10.1002/jhet.5570340205
日期:1997.3
The reaction of guanidine carbonate with various ortho-fluorobenzaldehydes in N,N-diinethylacetamide was investigated as a potential route for preparing 2-aminoquinazolines. Eleven new 2-aminoquinazolines were elaborated in this manner in low to moderate yields. In general the best results were obtained with ortho-fluorobenzaldehydes possessing an electron withdrawing substituent at the other ortho