Synthesis of substituted carbazoles and β -carbolines by cyclization of diketoindole derivatives
作者:Eric Duval、Gregory D. Cuny
DOI:10.1016/j.tetlet.2004.05.053
日期:2004.7
β-carbolines and carbazoles is described. Diketoindole intermediates, prepared by Friedel–Crafts acylations of 3-substituted indoles, have been converted to 3-hydroxycarbazoles and β-carbolines in good yields, 51–96% and 82–97%, respectively. This method also allows for the formation of 4-substituted β-carbolines. The application of this methodology to the synthesis of the natural products hyellazole and 6-chlorohyellazole
描述了取代β-咔啉和咔唑的新途径。由3-取代的吲哚的Friedel-Crafts酰化反应制备的二酮吲哚中间体已分别以良好的收率(分别为51-96%和82-97%)转化为3-羟基咔唑和β-咔啉。该方法还允许形成4-取代的β-咔啉。还介绍了该方法在合成天然产物透明质酸和6-氯透明质酸中的应用。