Synthesis of Four Enantiomers of (1-Amino-3-Hydroxypropane-1,3-Diyl)Diphosphonic Acid as Diphosphonate Analogues of 4-Hydroxyglutamic Acid
作者:Liwia Lebelt、Iwona E. Głowacka、Dorota G. Piotrowska
DOI:10.3390/molecules27092699
日期:——
All the enantiomers of (1-amino-3-hydroxypropane-1,3-diyl)diphosphonic acid, newly design phosphonate analogues of 4-hydroxyglutamic acids, were obtained. The synthetic strategy involved Abramov reactions of diethyl (R)- and (S)-1-(N-Boc-amino)-3-oxopropylphosphonates with diethyl phosphite, separation of diastereoisomeric [1-(N-Boc-amino)-3-hydroxypropane-1,3-diyl]diphosphonates as O-protected esters
获得了新设计的4-羟基谷氨酸膦酸酯类似物(1-氨基-3-羟基丙烷-1,3-二基)二膦酸的所有对映体。合成策略包括( R )-和( S )-1-( N -Boc-氨基)-3-氧代丙基膦酸二乙酯与亚磷酸二乙酯的Abramov反应,分离非对映异构体[1-( N -Boc-氨基)-3-羟基丙烷-1,3-二基]二膦酸酯作为O-保护的酯,然后水解成对映体膦酸。通过比较从相应的顺式和反式-[1-( N -Boc-氨基)-3对获得的( S ) -O-甲基扁桃酸酯的31 P NMR化学位移,确定了对映体膦酸酯的绝对构型。 -羟基丙烷-1,3-二基]二膦酸盐根据溢出规则。