Synthesis and stereochemistry of new 1,3-thiazolidine systems based on 2-amino-2-(mercaptomethyl)propane-1,3-diol: 4,4-bis(hydroxymethyl)-1,3-thiazolidines and c-5-hydroxymethyl-3-oxa-7-thia-r-1-azabicyclo[3.3.0]octanes
作者:Cristina Morar、Carmen Sacalis、Pedro Lameiras、Albert Soran、Hassan Khartabil、Cyril Antheaume、Ioan Bratu、Oana Moldovan、Mircea Darabantu
DOI:10.1016/j.tet.2013.09.070
日期:2013.11
2-amino-2-(mercaptomethyl)propane-1,3-diol [‘2-(hydroxymethyl)cysteinol’] with aryl(di)aldehydes is reported. The resulting new class of 2-aryl-4,4-bis(hydroxymethyl)-1,3-thiazolidines is investigated by NMR and IR spectroscopy in tandem with DFT calculations, permitting structural assignments that are discussed in terms of conformational analysis, anomeric effects and ring-chain tautomerism. These acquired
报道的2-氨基-2-(巯基甲基)丙烷-1,3-二醇[“2-(羟甲基)cysteinol”]的芳基的(二)醛thiaminalisation。将得到的类新的2-芳基-4,4-双(羟甲基)-1,3-噻唑烷通过NMR和IR光谱与DFT计算串联调查,从而允许了在构象分析,端基异构效应来讨论结构分配和环链互变异构现象。这些获取的数据随后被利用。用甲醛处理后,随后的(双)区域选择性和1,3-噻唑烷构建块,得到第一非对称串联的噻唑烷 - 恶唑烷稠合的系统在C-5位置单独使用官能化的非对映选择性oxaminalisation。一个意想不到的重排,它由Ar的分搬迁从1,3-噻唑烷配体与1,3-恶唑烷环,被观察为在氩环的取代有重大影响。标题双环体系,其公开的均聚物和/或异向非键合相互作用的第一单晶X射线分析,也提出。