One-step ring-closure procedure for 4,5-dihydro-1,3-thiazino[5,4-b]indole derivatives with Lawesson's reagent. The fifth dihydro-1,3-thiazino[b]indole isomer
作者:Péter Csomós、Lajos Fodor、Gábor Bernáth、Antal Csámpai、Pál Sohár
DOI:10.1002/jhet.607
日期:2011.9
corresponding 3‐phenylthiourea‐2‐carboxylic acid ester derivatives by chemoselective reduction of the ester group, followed by ring closure under acidic conditions. The structures of the novel products were elucidated by IR, 1H‐NMR, and 13C‐NMR spectroscopy, including 2D‐HMQC, 2D‐HMBC, and DEPT measurements. J. Heterocyclic Chem., (2011).
我们报告了一种合成新环系统的简便方法:4,5-二氢-1,3-噻嗪基[5,4- b ]吲哚。该程序涉及在二氧化硅存在下使用Lawesson试剂,以实现2-苯甲酰基氨基-3-羟甲基吲哚中间体的一步闭环反应,从而提供4,5-二氢-2--2-芳基-1,3-噻嗪基[ 5,4‐ b ]吲哚。通过相应的3-苯基硫脲-2-羧酸酯衍生物,通过化学选择性还原酯基,然后在酸性条件下闭环,可得到2-苯基亚氨基-1,3-噻嗪[5,4- b ]吲哚。红外,1 H-NMR和13阐明了新产品的结构C-NMR光谱,包括2D-HMQC,2D-HMBC和DEPT测量。J.杂环化学。(2011)。