Unusual behavior of 3-(dimethylamino)-1-(2-hydroxyphenyl)prop-2-en-1-one towards some phosphorus reagents: Synthesis of novel diethyl 2-phosphonochromone, diethyl 3-phosphonopyrone and 1,3,2-oxathiaphosphinines
作者:Tarik E. Ali、Mohammed A. Assiri、Ibrahim S. Yahia、Heba Y. Zahran
DOI:10.1080/00397911.2018.1560874
日期:2019.2.16
of enaminone 1 with O,O-diethyl dithiophosphoric acid and Lawesson’s reagent. When enaminone 1 was also treated with phosphorus decasulfide, it was turned into 4H-thiochromene-4-thione while its treatment with phosphorus tribromide, phosphorus oxychloride, or phenylphosphonic dichloride, 4H-4-oxo-chromene was isolated in all cases. The possible reaction mechanisms of the formation of these products were
摘要 研究了3-(二甲氨基)-1-(2-羟基苯基)prop-2-en-1-one (1) 对某些磷试剂的化学反应性。通过在碱性介质中用亚磷酸二乙酯处理,烯胺酮 1 环化成 2-膦酰基色酮二乙酯 2。然而,它与三乙氧基膦酰基乙酸酯反应得到取代的吡喃膦酸酯 3。此外,4-(二甲氨基)-6-(2-羟基苯基)-2-硫基-4H-1,3,2-氧硫磷-膦的两个新实例6和7是通过用O,O-二乙基二硫代磷酸和劳森试剂处理烯胺酮1获得的。当烯胺酮1也用十硫化二磷处理时,它变成了4H-thiochromene-4-thione,而用三溴化磷、磷酰氯或苯基二氯化磷处理时,在所有情况下都分离出4H-4-oxo-chromene。讨论了这些产物形成的可能反应机制。通过元素分析和光谱工具建立了新分离产物的结构。图形概要