Reaction of 3-bromobenzyl and 3-bromoacetyl coumarin with phosphites. Synthesis of some new phosphonates and phosphates in the coumarin series
作者:Rositca Nikolova、Anka Bojilova、Nestor A. Rodios
DOI:10.1016/s0040-4020(98)00892-8
日期:1998.11
3 with trialkyl phosphites afforded in good yields the corresponding dialkyl phosphonates 5, the Arbuzov reaction products. The interaction of trialkyl phosphites with 3-(ω-bromoacetyl)coumarin 4 gave the corresponding dialkyl vinylphosphates 8 as the only isolated products, whereas dialkyl phosphites reacted with 4 under phase transfer catalysis and gave vinylphosphates 8 or dialkyl 1,2-epoxy-ethylphosphonates
3-(1-溴苄基)香豆素3与亚磷酸三烷基酯的反应以良好的产率提供了相应的二烷基膦酸酯5,即Arbuzov反应产物。亚磷酸三烷基酯与3-(ω-溴乙酰基)香豆素4的相互作用产生了相应的二烷基乙烯基磷酸酯8作为唯一的分离产物,而亚磷酸二烷基酯在相转移催化下与4反应生成了乙烯基磷酸酯8或1,2-环氧-乙基膦酸二烷基酯。9。β-氧代膦酸酯7是从衍生物10的反应获得的。用亚磷酸三烷基酯与随后的二烷基β-hydr基膦酸酯11的水解反应形成。