作者:M. Grazia Cabiddu、Salvatore Cabiddu、Enzo Cadoni、Stefania De Montis、Claudia Fattuoni、Stefana Melis、Michele Usai
DOI:10.1055/s-2002-28523
日期:——
A rapid, one-step preparation of 2-(arylmethylidene)-1-benzothiophen-3-ones (thioaurones) using directed α-metallation, ring closure and aldol-type condensation is described. The reaction leads exclusively to the Z-isomer.
Cu-Catalyzed and iodine mediated synthesis of thioaurones <i>via in situ</i> C–S bond generation using xanthate as a sulfur surrogate
作者:Palanisamy Soundarya、Govindasamy Sekar
DOI:10.1039/d2ob01211a
日期:——
An efficient method for synthesizing thioaurones has been developed using xanthate as an odorless sulfur surrogate. This reaction's key success lies in the use of iodine as a reagent, which promotes the α-iodination followed by cyclization of saturated ketones. This methodology has also been demonstrated with less reactive 2′-bromochalcones in good yield. Synthesis of the red isomer of indigo, i.e