An operationally simple and efficient one-pot protocol for the synthesis of highly functionalized thiazolidin-4-ones and thiazolines has been devised via Rh(OAc)₂-catalyzed annulative coupling of β-ketothioamides with diazo compounds under mild reaction conditions for the first time. This double functionalization of diazo compounds proceeds via selective S-alkylation followed by intramolecular N-cyclization enabling the formation of C–S and C–N bonds at moderate temperature. Notably, the products possess Z-stereochemistry with regard to the exocyclic C═C double bond at the 2-position of the ring. Further, the synthetic utility of the strategy has been revealed to access 2,3-dihydrobenzo[d]thiazoles. Remarkably, atom economy and tolerance of a wide range of functional groups are added characteristics to this strategy.

中文翻译：

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铑（II）催化的β-酮硫酰胺与α-重氮化合物的环形偶联：获得高度官能化的噻唑烷丁-4-酮和噻唑啉。

首次在温和的反应条件下，通过Rh（OAc）₂催化β-酮硫酰胺与重氮化合物的环状偶联，设计了一种操作简单且有效的一锅操作方案，用于合成高度功能化的噻唑烷酮-4-酮和噻唑啉。重氮化合物的这种双重功能化是通过选择性的S-烷基化，然后进行分子内的N-环化来实现的，从而在中等温度下形成C–S和C–N键。值得注意的是，产物在环的2-位上的环外C═C双键具有Z-立体化学。此外，该策略的综合效用已显示出可用于2,3-二氢苯并[ d]。噻唑类。值得注意的是，原子经济性和对各种官能团的耐受性是该策略的附加特征。