A Tandem Reduction-Oxidation Protocol for the Conversion of 1-Keto-1,2,3,4-tetrahydrocarbazoles to Carbazoles via Tosylhydrazones through Microwave Assistance: Efficient Synthesis of Glycozoline, Clausenalene, Glycozolicine, and Deoxycarbazomycin B and th
作者:Suchandra Chakraborty、Gautam Chattopadhyay、Chandan Saha
DOI:10.1002/jhet.999
日期:2013.1
methodology for the synthesis of carbazoles from 1‐keto‐1,2,3,4‐tetrahydrocarbazoles via the corresponding tosylsulfonhydrazones by a one‐pot tandem reduction–oxidation protocol using a combination of NaBH4 and Pd–C on MgSO4·7H2O, a solid support, under microwave is developed. The reaction is successfully extended toward the synthesis of several naturally occurring carbazole alkaloids, namely 3‐methylcarbazole
一种新颖高效的方法,通过NaBH 4和Pd-C的组合,通过一锅串联还原-氧化方案,通过相应的甲苯磺酰基hydr肼,通过相应的甲苯磺酰基hydr,由1-酮,1,2,3,4-四氢咔唑合成咔唑在微波作用下形成了4 ·7H 2 O(一种固体支持物)。该反应已成功地扩展到几种天然存在的咔唑生物碱的合成,即3-甲基咔唑,糖唑啉,黄嘌呤,糖唑啉,墨瑞福林A和脱氧咔唑霉素B(一种已知具有良好抗菌活性的咔唑衍生物)。