Diastereoselective synthesis of functionalized spiro[cyclopropane-1,3′-indolines] and spiro[indoline-3,1′-cyclopropane-2′,3″-indolines]
作者:Wen-Jie Qi、Ying Han、Chao-Guo Yan
DOI:10.1016/j.tet.2016.06.020
日期:2016.8
reaction of isatin with arylidene pivaloylacetonitriles in dry methylene dichloride afforded functionalized spiro[cyclopropane-1,3′-indolines] in good yields and with high diastereoselectivity. Moreover, the similar reaction of isatins with isatylidene malononitriles predominately gave spiro[indoline-3,1′-cyclopropane-2′,3″-indolines] in very high yields with two indoline moieties in trans-configuration
在六甲基亚磷酸三酰胺存在下,靛红与亚芳基新戊酰乙腈在干燥的二氯甲烷中的反应以高收率和高非对映选择性提供官能化的螺[环丙烷-1,3'-二氢吲哚]。此外,靛红与异亚丙基丙二腈的相似反应主要以非常高的产率得到螺[吲哚啉-3,1'-环丙烷-2',3″-吲哚啉],其中两个吲哚啉部分处于反式构型。