Regiospecific synthesis of 1,5,6,7-tetrahydro-4H-indol-4-ones via dehydroxylated [3+2] cyclization of β-hydroxy ketones with cyclic enaminones
作者:Xin-Chan Lan、Ting-Ting Chen、Yan Zhao、Yu Wu、Jing Wang、Shu-Jiang Tu、Bo Jiang、Wen-Juan Hao
DOI:10.1016/j.tetlet.2017.03.009
日期:2017.4
cyclization strategy has been established, allowing a flexible, practical and regiospecific approach to 23 examples of 1,5,6,7-tetrahydro-4H-indol-4-ones from low-cost and readily accessible β-hydroxy ketones and cyclic enaminones. Notably features of this work include broad functional group compatibility, mild reaction conditions and good reaction yields.
已经建立了一种新的p -TsOH促进的脱羟基[3 + 2]环化策略,该方法可以灵活,实用且对区域特定的方法来处理23个来自1,5,6,7-tetrahydro-4 H -indol -4- one的实例低成本且易于获得的β-羟基酮和环状烯胺酮。这项工作的显着特点包括广泛的官能团相容性,温和的反应条件和良好的反应收率。