PPh3/DDQ as a neutral system for the facile preparation of diethyl α-bromo, α-iodo and α-azidophosphonates from diethyl α-hydroxyphosphonates
作者:Habib Firouzabadi、Nasser Iranpoor、Sara Sobhani
DOI:10.1016/j.tet.2003.10.058
日期:2004.1
The mixture of triphenylphosphine (PPh3) and 2,3-dichloro-5,6-dicyanobenzquinone (DDQ) as a neutral system has been used for the preparation of various types of diethyl α-bromo, α-iodo and α-azidophosphonates from their corresponding diethyl α-hydroxyphosphonates in the presence of n-Bu4NBr, n-Bu4NI and NaN3 in good to high yields.
三苯膦(PPh 3)和2,3-二氯-5,6-二氰基苯并醌(DDQ)的混合物已用作中性体系,用于从中制备各种类型的二乙基α-溴,α-碘和α-叠氮膦酸酯在n -Bu 4 NBr,n -Bu 4 NI和NaN 3的存在下,它们相应的α-羟基膦酸二乙酯的产率高到高。