Remarkable Conversion of 2-Thioxo-2,3-dihydroquinazolin-4(1H)-ones into the Corresponding Quinazoline-2,4(1H,3H)-diones: Spectroscopic Analysis and X-Ray Crystallography
作者:Adel S. El-Azab、Nasr Y. Khalil、Alaa A.-M. Abdel-Aziz
DOI:10.1155/2021/6612177
日期:2021.4.2
analysis. The crystal structure of 6-methyl-3-phenylquinazoline-2,4(1H,3H)-dione (11) [C15H12N2O2: MF = 252.27, triclinic, P-1, a = 7.8495 (13) Å, b = 12.456 (2) Å, c = 13.350 (2) Å, α = 103.322 (3)°, β = 90.002 (3)°, γ = 102.671 (4)°, V = 1237.5 (3) Å3, Z = 4, R = 0.0592, wR = 0.1699, S = 1.039] was determined. In the crystal cell, two identical conformers of compound 11 were found connected by intramolecular
一个简单的和有效的新的合成方法,得到3-取代的喹唑啉-2,4-二酮9 -通过3-取代的-2-硫代喹唑啉-4-酮反应16 1 - 8与温和的条件下氨基钠提出。新合成的化合物的结构通过红外光谱,紫外可见光谱,核磁共振和单晶X射线晶体学分析确定。6-甲基-3-苯基喹唑啉-2,4(1H,3H)-二酮的晶体结构(11)[C 15 H 12 N 2 O 2:MF = 252.27,三斜晶系,P-1,a = 7.8495(13 )Å,b = 12.456(2)Å,c = 13.350(2)埃,α = 103.322(3)°,β = 90.002(3)°,γ = 102.671(4)°,V = 1237.5(3)3,Ž = 4,- [R = 0.0592,WR =确定为0.1699,S = 1.039]。在该晶胞中,发现化合物11的两个相同构象异构体通过分子内氢键连接,这是这两个独立分子的有利发生原因。