Synthesis of (3S,3S′,4S,4S′)-1,1′-ethylenedipyrrolidine-3,3′,4,4′-tetraol and related diamino diols: donor–acceptor hydrogen-bonding motifs of the C2 symmetric 3,4-dihydroxypyrrolidine unit
作者:Charles M. Marson、Robert C. Melling、Simon J. Coles、Michael B. Hursthouse
DOI:10.1016/j.tetasy.2005.07.024
日期:2005.8
4-disubstitution have been prepared from esters of l-(+)-tartaric acid. Although diacylation routes via the diacetoxypyrrolidin-2,5-diones were problematic, N,N-dialkylation protocols proved to be reliable and led to the synthesis of (3S,3S′,4S,4S′)-1,1′-ethylenedipyrrolidine-3,3′,4,4′-tetraol, (3R,3′S,4R,4′S)-3,4-diamino-1,1′-ethylenedipyrrolidine-3′,4′-diol and (3R,3′R,4S,4′S)-3,3′-diamino-1,1′-ethylenedipyrrolidine-4
由1-(+)-酒石酸的酯制备了具有3,4-二取代的对映体纯的1,1'-亚乙基二吡咯烷。尽管通过二乙酰氧基吡咯烷丁-2,5-二酮进行的二酰化途径存在问题,但N,N-二烷基化方案被证明是可靠的,并导致了(3 S,3 S ',4 S,4 S ')-1,1的合成′ -乙烯二吡咯烷-3,3',4,4'-四醇,(3 R,3 'S,4 R,4 'S)-3,4-二氨基-1,1'-乙烯二吡咯烷-3',4'二醇和(3 - [R,3' - [R,4小号,4'小号)-3,3′-二氨基-1,1′-亚乙基二吡咯烷-4,4′-二醇。四元醇具有一种晶体结构,该晶体结构表现出不寻常的之字形分子间图案,该分子间的图案包括氢键网络,该氢键网络涉及末端羟基和吡咯烷环之一的氮原子。