Organocascade Synthesis of Bicyclo[3.3.1]nonan-9-ones Initiated by an Unusual 1,6-Addition of Cyclohexanones to (<i>E</i>
)-2-(3-Arylallylidene)-1<i>H</i>
-indene-1,3(2<i>H</i>
)-diones
作者:De-Chih Wang、Pin-Han Huang、Wan-Wun Huang、You-Song Cheng、Kwunmin Chen
DOI:10.1002/adsc.201700338
日期:2017.9.4
to >20:1 dr and 97% ee) in the presence of a thioether‐linked l‐prolinol‐camphor‐derived organocatalyst at ambient temperature. An interesting organocatalytic three‐component triple cascade reaction has been performed to produce a bicyclo[2.2.2]octan‐2‐one in a favorable chemical yield and stereoselectivity (>19:1 dr and 97% ee) starting from 1,3‐indanedione, an enal, and cyclohexenone in the presence
报道了一种有效的有机催化级联反应,用于合成双环[3.3.1] nonan-9-one骨架。级联反应在前手性4-取代的环己酮和(E)-2-(3-芳基亚芳基)-茚-1,3-二酮之间进行得很顺利,涉及1,6- /γ-质子化/ 1,4-加成序列的构建包含在良好5个立体中心,以高化学产率和优异的diastereo-和对映选择性双环产品(高达> 20:1个博士和97%ee值)在一个硫醚连接的存在下升常温下由脯氨醇樟脑胶衍生的有机催化剂。已经进行了有趣的有机催化三组分三级联反应,以从1,3-开始的良好化学收率和立体选择性(> 19:1 dr和97%ee)产生了双环[2.2.2] octan-2-one。在伯胺有机催化剂存在下,茚满二酮,一种烯类和环己烯酮。