Axially Chiral Cyclic Phosphoric Acid Enabled Enantioselective Sequential Additions
作者:Xi Yuan、Xudong Wu、Pengxiang Zhang、Fei Peng、Can Liu、Haijun Yang、Changjin Zhu、Hua Fu
DOI:10.1021/acs.orglett.8b04012
日期:2019.4.19
Efficient axially chiral cyclic phosphoric acid catalyzed enantioselective sequential additions of 2-aryl-3H-indol-3-ones, aldehydes, and diethyl 2-aminomalonate have been developed, and a new type of nitrogen-containing heterocyclic compounds, 2,3-dihydro-1H-imidazo[1,5-a]indol-9(9aH)-one derivatives, were prepared in good yields and excellent ee values with a wide functional group tolerance, in which
已经开发出有效的轴向手性环状磷酸催化2-芳基-3 H-吲哚-3-酮,醛和2-氨基丙二酸二乙酯的对映选择性顺序添加,并开发了一种新型的含氮杂环化合物2,3-以良好的收率和优异的ee值制备了二氢-1 H-咪唑并[1,5- a ]吲哚-9(9a H)-one衍生物,具有宽泛的官能团耐受性,其中底物的反应性和对映选择性为由我们新开发的轴向手性环状磷酸(R)-CYC-9-CPA支持。此外,相应的1 H-咪唑并[1,5- a ]吲哚-9(9a H通过简单地氧化2,3-二氢-1 H-咪唑并[1,5- a ]吲哚-9(9a H)-one衍生物来构建1 )-ones。