A General Carbazole Synthesis via Stitching of Indole–Ynones with Nitromethanes: Application to Total Synthesis of Carbazomycin A, Calothrixin B, and Staurosporinone
作者:Shweta Singh、Ramesh Samineni、Srihari Pabbaraja、Goverdhan Mehta
DOI:10.1021/acs.orglett.9b01111
日期:2019.5.3
functionalized carbazole frameworks (28 examples). The scope of this new benzannulation has been extended to variants like 2-chloroindole-3-ynones to eventuate in chemo-differentiated 1,2,3,4-tetrasubstituted carbazoles with retention of the nitro group. The efficacy of this strategy has been demonstrated through concise total synthesis of natural products, viz. carbazomycin A, calothrixin B, and staurosporinone
已经探索了吲哚-3-炔酮和各种硝基甲烷衍生物之间的新的一锅多米诺苯甲环化反应,以广泛进入功能不同的咔唑骨架(28个例子)。这种新的苯并环的作用范围已扩展至诸如2-氯吲哚-3-炔酮之类的变体,从而最终在化学上分化后的1,2,3,4-四取代咔唑中保留了硝基。该策略的功效已通过天然产物的简明全合成证明。卡巴霉素A,杯速霉素B和星形孢菌素(K252c)。