Catalytic chemoselective [3+3] cycloadditions of azomethine ylides with quinone monoimides leading to the construction of a dihydrobenzoxazine scaffold
One-Pot, Three-Component, Highly
Diastereoselective Metal-Free Synthesis of 2,3,4,5-Tetrasubstituted
Pyrrolidines
作者:Ramon Rios、Luis Crovetto
DOI:10.1055/s-2008-1078566
日期:——
An extremely efficient, highly diastereoselective, metal-freesynthesis of 2,3,4,5-tetrasubstituted pyrrolidines is described. The three-component reaction between aldehydes, aminomalonates, and nitroalkenes proceeds with high diastereoselectivities and high yields.
Cu(OAc)<sub>2</sub>/FOXAP complex catalyzed construction of 2,5-dihydropyrrole derivatives via asymmetric 1,3-dipolar cycloaddition of azomethine ylides to ethynyl ketones
作者:Fei-Fei Tang、Wu-Lin Yang、Xingxin Yu、Wei-Ping Deng
DOI:10.1039/c5cy00422e
日期:——
Catalytic asymmetric1,3-dipolarcycloaddition of azomethineylides to ethynyl ketones catalyzed by the Cu(OAc)2/FOXAP (ferrocenyl oxazolinylphosphine) complex was developed, affording 2,5-dihydropyrrole derivatives in good to excellent yields (up to 99%) and excellent levels of enantioselectivities (up to 98% ee). This highly efficient chiral N,P-ligand/Cu(OAc)2 catalytic system was also applicable
Catalytic Enantioselective and Regioselective [3+3] Cycloadditions Using 2-Indolylmethanols as 3 C Building Blocks
作者:Xiao-Xue Sun、Hong-Hao Zhang、Guo-Hao Li、Ying-Ying He、Feng Shi
DOI:10.1002/chem.201603049
日期:2016.12.5
The first catalytic asymmetric cycloaddition using 2‐indolylmethanols as 3C building blocks has been established by a chiral phosphoric acid‐catalyzed enantioselective and regioselective [3+3] cycloaddition of 2‐indolylmethanols with azomethine ylides, which constructed biologically important tetrahydro‐γ‐carboline frameworks in high yields and excellent enantioselectivities (up to 83 % yield, 99:1
Brønsted Acid-Catalyzed Three-Component 1,3-Dipolar Cycloadditions of 1,2-Disubstituted Alkynes with Aldehyde-Generated Azomethine Ylides
作者:Wei Tan、Bai-Xiang Du、Lu Guo、Mei Li、Gui-Juan Xing、Feng Shi
DOI:10.1002/jhet.2111
日期:2015.7
The first 1,3‐dipolarcycloadditions (1,3‐DCs) of 1,2‐disubstituted alkynes with aldehyde‐generatedazomethineylides have been established, leading to the efficient synthesis of poly‐substituted 2,5‐dihydropyrroles.The Brønsted acid‐catalyzed three‐component 1,3‐DCs of but‐2‐ynedioates, aldehydes, and diethyl 2‐aminomalonate tolerate a wide range of substrates, offering structurally diverse poly‐substituted
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 phosphoricacidcatalyzedenantioselective 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。