Treatment of (indol-1-yl)magnesium bromide or iodide with 2-bromoethyl isothiocyanate afforded 1-(4,5-dihydrothiazol-2-yl)indole (6). Analogous reaction with 2,2-dimethoxyethyl isothiocyanate led to corresponding 1-thiocarbamoylindole derivative (7), which was cyclized to 1-(5-methoxy-4,5-dihydrothiazol-2-yl)indole (8) by treatment with boron trifluoride etherate. New analogs of camalexin, namely 4',5'-dihydrocamalexin (12) and benzocamalexin (14) were prepared by cyclocondensation reaction of 1-(tert-butoxycarbonyl)indole-3-carbaldehyde with cysteamine and 2-aminobenzenethiol. Antifungal activity of the prepared compounds was studied, using the fungi Alternaria brassicae and Alternaria brassicicola.
使用2-溴乙基异硫氰酸酯处理吲哚-1-基溴化镁或碘化镁,得到1-(4,5-二氢噻唑-2-基)吲哚(6)。类似的反应,使用2,2-二甲氧基乙基异硫氰酸酯,得到相应的1-硫代氨基甲酰吲哚衍生物(7),用氟化硼乙醚处理,环化成1-(5-甲氧基-4,5-二氢噻唑-2-基)吲哚(8)。通过1-(叔丁氧基羰基)吲哚-3-甲醛与半胱胺和2-氨基苯硫醇的环缩合反应,制备了卡玛列辛的新类似物,即4',5'-二氢卡玛列辛(12)和对苯卡玛列辛(14)。研究了所制备化合物对真菌Alternaria brassicae和Alternaria brassicicola的抑菌活性。