“…In a very recent publication, Xiong et al [ 132 ] reported the synthesis of 4-tetrazolyl-3,4-dihydroquinazoline derivatives through a sequential Palladium-catalyzed azide-isocyanide cross-coupling/cyclization Ugi reaction, with good yields. The Ugi-azide reactions of various 2-azidobenzaldehydes (R 1 = 4-F, 4-Cl, 4-CH 3 O and 5-Me), amines (R 2 = Ph, 4-Cl-Ph, 4-Br-Ph, 4-CH 3 -Ph, 4-CH 3 O-Ph, 2-Cl-Ph, 2,4-dimethyl-Ph, n -Bu, i -Pr, t -Bu), trimethylsilyl azide and isocyanides (R 3 = t -Bu, c -C 6 H 11 , 1-adamantyl, n -Bu) produced azide intermediates that were treated with diverse isocyanides (R 4 = t -Bu, c -C 6 H 11 , 1-adamantyl, 4-CH 3 O-Ph, 4-Cl-Ph, MeO 2 CCH 2 , TsCH 2 ) to afford compound 18 examples of dihydroquinazoline derivatives ( Scheme 14 ).…”