作者:Tuan P. Tran、Edmund L. Ellsworth、Brian M. Watson、Joseph P. Sanchez、H. D. Hollis Showalter、John R. Rubin、Michael A. Stier、Judy Yip、Dai Q. Nguyen、Paul Bird、Rajeshwar Singh
DOI:10.1002/jhet.5570420428
日期:2005.5
1H-quinazoline-2,4-dione 10 was made starting with fluorobenzoic acid in three high yielding steps. The key step of this synthesis involved the generation of the dianion of urea 7 and the subsequent intramolecular nucleophilic displacement of the 2-fluoro to form the quinazolinedione ring. The 3-amino moiety was incorporated using (2,4-dinitro-phenyl)-hydroxylamine as the aminating reagent.
描述了一系列3-氨基-1 H-喹唑啉-2,4-二酮的新合成。从氟苯甲酸开始,在三个高产率步骤中制备1 H-喹唑啉-2,4-二酮10。该合成的关键步骤涉及尿素7的二价阴离子的产生和随后的2-氟分子内亲核取代以形成喹唑啉二酮环。使用(2,4-二硝基-苯基)-羟胺作为胺化试剂并入3-氨基部分。