Quinazolines. IV. Synthesis and Hydrolysis of 3-(4'-Quinazoyl)-4-quinazolone<sup>1</sup>
作者:Arthur J. Tomisek、Bert E. Christensen
DOI:10.1021/ja01182a520
日期:1948.2
KARMINSKI, W.;KULICKA, J.;MIERNIK, J., J. ENVIRON. SCI. AND HEALTH, 1983, 18, N 4-5, 627-632
作者:KARMINSKI, W.、KULICKA, J.、MIERNIK, J.
DOI:——
日期:——
The Scope and Mechanism of Phosphonium-Mediated S<sub>N</sub>Ar Reactions in Heterocyclic Amides and Ureas
作者:Zhao-Kui Wan、Sumrit Wacharasindhu、Christopher G. Levins、Melissa Lin、Keiko Tabei、Tarek S. Mansour
DOI:10.1021/jo7020373
日期:2007.12.1
An efficient “one-step” synthesis of cyclic amidines and guanidines has been developed. Treatment of cyclic amides and ureas with benzotriazol-1-yloxytris(dimethylamino)phosphonium hexafluorophosphate (BOP), base, and nitrogen nucleophiles leads to the formation of the corresponding cyclic amidines and guanidines, typically in good to excellent yields. This method has also been used to prepare heteroaryl