4-dihydroxypyrrolidine derivatives were synthesized and exploited as synthons for the preparation of hydroxypyrrolidine nucleoside phosphonic acids, the 3′-deoxynucleoside 5′-phosphate analogues. Simultaneously, an alternative route, the N-phosphoalkylation of the preformed pyrrolidine nucleosides employing Mannich- and Michael-type reactions, was investigated to obtain desired nucleotide analogues. In contrast to
合成了N-膦酰基烷基-反式-3,4-二羟基
吡咯烷衍
生物,并将其用作合成子来制备羟基
吡咯烷核苷
膦酸,即3'-
脱氧核苷5'-
磷酸类似物。同时,研究了另一种途径,即利用曼尼希和迈克尔型反应对预先形成的
吡咯烷核苷进行N-
磷酸烷基化,以获得所需的
核苷酸类似物。与后一种方法相反,前一种方法很可能由于亲核置换过程中存在两个可能的S N 2过渡态而形成了两个非对映异构体。通过NMR光谱研究了所制备的
核苷酸类似物的立体
化学。