Reactivity study on morpholine-1-carbothioic acid (2-phenyl-3<i>H</i>-quinazolin-4-ylidene) amide
作者:Walid Fathalla、Pavel Pazdera、Michal Čajan、Jaromír Marek
DOI:10.1002/jhet.5570390606
日期:2002.11
Regioselective reactions of morpholine-1-carbothioic acid (2-phenyl-3H-quinazolin-4-ylidene) amide (1) with electrophiles and nucleophiles were studied. The compound (1) reacts with alkyl halides in basic medium to afford S-substituted isothiourea derivatives, with amines to give 1,1-disubstituted-3-(2-phenyl-3H-quinazolin-4-ylidene) thioureas and l-substituted-3-(2-phenyl-quinazolin-4-yl) thioureas
吗啉-1-硫代羟酸(2-苯基-3-的区域选择性反应ħ -喹唑啉-4-亚基)酰胺(1与亲电和亲核试剂)进行了研究。的化合物(1)反应在碱性介质中的烷基卤,得到小号取代的异硫脲衍生物,与胺,得到1,1-二取代的3-(2-苯基-3- ħ -喹唑啉-4-亚基)硫脲和1-通过氨基转移反应取代3-(2-苯基-喹唑啉-4-基)硫脲。所述的(反应1)与胺在H存在2 ö 2提供Ñ 4 -disubstituted- Ñ ' 4-(2-苯基喹唑啉-4-基)吗啉-4-羧酰亚胺通过氧化脱硫。使用从头算(HF / 6-31G **)量子化学计算来支持对(1)上反应位点的估计。红外,1 H核磁共振,13 C核磁共振,质谱和X射线鉴定了分离出的产物。