A practical and efficient synthesis of 2,4,6,8-tetrasubstituted quinazolines through one-pot chemoselective sequential bis-SNAr/bis-Suzuki-Miyaura reactions under microwave irradiation is presented. The bis-SNAr reaction occurs selectively at the C-2 and C-4 positions of 6,8-dibromo-2,4-dichloroquinazoline and the bis-Suzuki-Miyaura cross-coupling at C-6 and C-8. This procedure affords convergent synthesis of polysubstituted quinazoline derivatives in high yields in very few steps and tolerates a wide range of boronic acids and amines.
VOLZHINA O. N.; AZIMOV V. A.; MEDVEDEV B. A.; KAZAKOV A. A.; ZHIXAREVA G.+, XIM.-FARMATS. ZH., 21,(1987) N 7, 802-807
作者:VOLZHINA O. N.、 AZIMOV V. A.、 MEDVEDEV B. A.、 KAZAKOV A. A.、 ZHIXAREVA G.+