Rational Design of Bifunctional Imidazoles as Acyl Transfer Catalysts: Dynamic Kinetic Resolution of 5-Hydroxy-furanones/3-Hydroxy-phthalides.

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Tác giả: Junbiao Chang, Yu Lan, Meng Shan, Qianqian Shi, Mengqi Wang, Shuping Yang, Yongmei Yu, Bo Zhu

Ngôn ngữ: eng

Ký hiệu phân loại: 271.6 *Passionists and Redemptorists

Thông tin xuất bản: United States : The Journal of organic chemistry , 2025

Mô tả vật lý:

Bộ sưu tập: NCBI

ID: 218762

A new class of chiral bifunctional imidazole catalysts has been designed and synthesized, utilizing economical amino alcohols as precursors, significantly expanding the diversity of N-1 position catalysts. These catalysts exhibit excellent substrate activation and stereoselectivity control and have been successfully employed in the asymmetric acylation of 5-hydroxy-furanones/3-hydroxy-phthalides through dynamic kinetic resolution, producing a series of chiral furanone and phthalide analogues featuring a quaternary stereocenter. This asymmetric acylation reaction exhibits excellent reactivity and enantioselectivity, has a wide range of applicability, requires a low catalyst loading, and can be readily converted into valuable building blocks. Moreover, DFT calculations revealed the detailed reaction mechanism and demonstrated that the weak N-H···O and C-H···O interactions between the catalyst and substrate are the key factors affecting the stereoselectivity.
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