4′-thiazol]-5′-ones. Formally, this transformation can be regarded as a Huisgen reaction of the exocyclic carbon–carbon double bond of the Erlenmeyer thioazlactones and azomethine ylides generated in situ. Evidence for the structure of a product was obtained from single-crystal X-ray analyses. The important feature of this reaction is the fact it forms four stereogenic centers, one of which is quaternary, with excellent
Erlenmeyer thioazlactones 与 3-(2-oxo-2-arylethyl)benzo[d]thiazol-3-ium bromides 在 Et 3 N 的存在下在 MeCN 中反应得到 1-aryloyl-2'-(benzylthio)-2-aryl -2,3a-dihydro-1 H ,5' H -螺[苯并[ d ]
吡咯并[2,1- b ]
噻唑-3,4'-
噻唑]-5'-酮。形式上,这种转变可以看作是 Erlenmeyer
硫代吖内酯和原位生成的甲
亚胺叶立德的环外碳-碳双键的 Huisgen 反应。产品结构的证据来自单晶 X 射线分析。该反应的重要特征是它形成了四个立体中心,其中一个是四元的,具有极好的选择性。