A yet-unexploited class of azomethine imines, C,N-cyclic azomethine imines, could be successfully employed in highly enantioselective1,3-dipolarcycloaddition with enals catalyzed by titanium-BINOLate to give pharmaceutically attractive tetrahydroisoquinoline and piperidine motifs.
<i>Syn</i>-Stereoselective C3-Spirocyclization and C2-Amination of 3-(2-Isocyanoethyl)indole Using <i>C</i>,<i>N</i>-Cyclic Azomethine Imines
作者:Wen-Bin Cao、Jian-Dong Zhang、Meng-Meng Xu、Hua-Wei Liu、Hai-Yan Li、Xiao-Ping Xu、Shun-Jun Ji
DOI:10.1021/acs.orglett.2c01736
日期:2022.7.1
underexplored reaction mode of C,N-cyclic azomethineimines, a catalyst-free [1+2+3] cycloaddition/N–N bond cleavage sequential reaction for accessing spiroindolines with syn-stereoselectivity was developed. On the basis of experimental results and DFT calculations, peroxide and ethereal solvent were identified to trigger the hydrogen abstraction of the unstable [1+2+3] cycloaddition adducts, followed
Phenylphosphinic Acid-Promoted Addition of Isocyanide to 1-Methoxyisochroman Derivatives
作者:Takahiro Soeta、Yutaka Ukaji、Syunsuke Matsuzaki
DOI:10.3987/com-18-s(t)23
日期:——
A synthetic method for preparation of isochroman-1-carboxylamides in good to high yields by addition of isocyanides to 1-methoxyisochroman derivatives in the presence of phosphinic acid was developed. A wide range of 1-methoxyisochroman derivatives and isocyanides were suitable for this reaction.