Sulfuryl Chloride Promoted gem-Dichlorination–Dehydrochlorination in Alkyl Benzothiazinylacetates: Synthesis of the Skeleton of Trichochrome Pigments
作者:Narshinha Argade、Ravi Jangir、Smita Gadre
DOI:10.1055/s-0034-1378714
日期:——
key steps. Chemo- and stereoselective total synthesis of the basic trichochrome skeleton is described starting from o-aminothiophenol and maleic anhydride in very good overall yield. The process involves the synthesis of the corresponding 1,4-benzothiazin-2-ylacetates followed by their sulfuryl chloride induced dihalogenation–dehydrohalogenation and a second condensation with o-aminothiophenol as key
摘要 从邻氨基苯硫酚和顺丁烯二酸酐开始,以非常好的总收率描述了基本的三色色素骨架的化学和立体选择性全合成。该过程涉及相应的1,4-苯并噻嗪-2-基乙酸酯的合成,然后由它们的硫酰氯诱导的二卤代-脱氢卤代,以及与邻氨基硫酚的第二次缩合作为关键步骤。 从邻氨基苯硫酚和顺丁烯二酸酐开始,以非常好的总收率描述了基本的三色色素骨架的化学和立体选择性全合成。该过程涉及相应的1,4-苯并噻嗪-2-基乙酸酯的合成,然后由它们的硫酰氯诱导的二卤代-脱氢卤代,以及与邻氨基硫酚的第二次缩合作为关键步骤。