Journal
CHIRALITY
Volume 34, Issue 9, Pages 1191-1196Publisher
WILEY
DOI: 10.1002/chir.23478
Keywords
asymmetric catalytic oxidation; chiral N-acyl sulfinamide; chiral phosphoric acid; N-acyl sulfonamide
Funding
- Higher Education Research Project Foundation of Gansu Provincial Department of Education, China [2020B-105]
- Joint Innovation Foundation of Lanzhou Jiaotong University-Tianjin University [2021053]
- Youth Science Foundation of Lanzhou Jiaotong University [2020047]
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This article describes a catalytic asymmetric synthesis method for N-acyl sulfinamides, using N-acyl sulfenamides as substrates and achieving high yields and enantioselectivities by forming efficient hydrogen bonds with chiral phosphoric acid, which can be easily converted to sulfoxides without loss of enantioselectivity.
Although the power of chiral sulfinamide reagents in synthetic chemistry has long been recognized, methods for their synthesis are still auxiliary-based approaches which possess the disadvantages of poor atom economy and limited substrate universality. Due to the weak nucleophilicity of amides, it is more difficult to prepare chiral N-acylsulfinamides by traditional methods. Herein, we describe an example of catalytic asymmetric synthesis of N-acyl sulfinamides. In this work, N-acyl sulfenamides act as useful substrates, because of the indispensable N-H bond, which could form an efficient hydrogen bond with chiral phosphoric acid. H2O2 (35%) was used as the terminal oxidant for preparation of sulfinamides in high yields and enantioselectivities, which could be easily derivatized to sulfoxides without loss of the enantioselectivity.
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