[4 + 2] Cycloadditions of 1-Phosphono-1,3-butadienes with Nitroso Heterodienophiles: A Versatile Synthetic Route for Polyfunctionalized Aminophosphonic Derivatives
作者:Jean-Christophe Monbaliu、Bernard Tinant、Jacqueline Marchand-Brynaert
DOI:10.1021/jo100230r
日期:2010.8.20
yl)-1,3-butadiene, and 1-(diethoxyphosphonyl)-3-tert-butyldimethylsilyloxy-1,3-butadiene with various nitroso heterodienophiles has been investigated as a new synthetic route for aminophosphonic derivatives. The HDA cycloadditions regioselectively led to the proximal isomers, i.e., presenting the NR3 group in the meta position regarding the phosphonate substituent. From the resulting 6-phosphono-3
1-(二乙氧基膦酰基)-1,3-丁二烯,1-(二苄氧基膦酰基)-1,3-丁二烯和1-(二乙氧基膦酰基)-3-叔丁基二甲基甲硅烷氧基-1的杂Diels-Alder(HDA)反应,具有各种亚硝基杂二烯的3-丁二烯已被研究为氨基膦衍生物的新合成途径。HDA环加成区域选择性地导致近端异构体,即,在关于膦酸酯取代基的间位存在NR 3基团。从所得的6-膦酰基-3,6-二氢-1,2-恶嗪环加合物中,允许进行有限数量的化学步骤,以获得在药物化学中潜在感兴趣的多种氨基膦化合物。(Z)-4-(o-甲苯基氨基)-1-羟基丁-2-烯基膦酸,3,4-二羟基-1-乙基二乙基邻甲苯基吡咯烷基-2-基-2-膦酸酯,4-(邻甲苯基氨基)-1,2,3-三羟基丁基膦酸,3-(2-(邻甲苯基氨基)-1-羟乙基)环氧乙烷-2-基-2-膦酸酯和4,5-二羟基吗啉-6-基-6-膦酸二乙酯。