Chiral 1,2,3-Triazolium Salt Catalyzed Asymmetric Mono- and Dialkylation of 2,5-Diketopiperazines with the Construction of Tetrasubstituted Carbon Centers,Angewandte Chemie International Edition

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Chiral 1,2,3-Triazolium Salt Catalyzed Asymmetric Mono- and Dialkylation of 2,5-Diketopiperazines with the Construction of Tetrasubstituted Carbon Centers
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2022-01-03 , DOI: 10.1002/anie.202114129
Ju-Song Yang ₁ , Ka Lu ₁ , Chen-Xiao Li ₁ , Zu-Hang Zhao ₁ , Xiao-Ming Zhang ₁ , Fu-Min Zhang ₁ , Yong-Qiang Tu _{1,

2}

Affiliation

Chiral spirocyclic-amide-derived triazolium salts were used as new phase-transfer organocatalysts for asymmetric alkylation to construct 2,5-diketopiperazine motifs containing one or two tetrasubstituted carbon centers in high yields with excellent cis-diastereoselectivity and enantioselectivity. Control experiments and DFT calculations revealed the possible reaction mechanism and the origins of the exceptional diastereo- and enantioselectivity.

中文翻译：

手性 1,2,3-三唑盐催化 2,5-二酮哌嗪的不对称单烷基化和二烷基化以及四取代碳中心的构建

手性螺环酰胺衍生的三唑鎓盐被用作不对称烷基化的新型相转移有机催化剂，以高产率构建含有一个或两个四取代碳中心的 2,5-二酮哌嗪基序，具有优异的顺式-非对映选择性和对映选择性。对照实验和 DFT 计算揭示了可能的反应机理和异常非对映选择性和对映选择性的起源。

更新日期：2022-01-03

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