Several heteroarenecarbonitriles were prepared from the corresponding heteroarene N-oxides by treatment with trimethylsilyl cyanide (TMSCN) in the presence of a base in tetrahydrofuran (THF). 1,8-Diazabicyclo[5.4.0]-7-undecene (DBU) was found to be an effective base for the cyanation.
Photolysis of 4-phenylquinazoline 3-oxides to benz[f]-1,3,5-oxadiazepines
作者:Chikara Kaneko、Sachiko Yamada
DOI:10.1016/s0040-4039(01)89650-7
日期:1967.1
Silver-Catalyzed Isocyanide Insertion into N−H Bond of Ammonia: [5+1] Annulation to Quinazoline Derivatives
A silver‐catalyzed [5+1] annulation of o‐acylaryl isocyanides with ammonium acetate and hydroxlamine was developed for the efficient and practical synthesis of quinazolines and quinazoline 3‐oxides in good to excellent yields, respectively. The domino process involved an unprecedented isocyanideinsertion into the N−H bond of ammonia or hydroxylamine and followed by condensation reaction at ambient