Efficient synthesis of 5-substituted thiazolidin-2-ones from xanthates and tert-butyl N-allylcarbamates
摘要:
A series of 5-substituted thiazolidin-2-ones with various functional groups was synthesized efficiently via a radical addition of xanthates and tert-butyl N-allylcarbamates and subsequent 88% HCO2H-catalyzed cyclization. The mechanism of the acid-catalyzed cyclization was proposed as well. (C) 2013 Elsevier Ltd. All rights reserved.
A Convergent Synthesis of Enantiopure Open-Chain, Cyclic, and Fluorinated α-Amino Acids
作者:Shi-Guang Li、Fernando Portela-Cubillo、Samir Z. Zard
DOI:10.1021/acs.orglett.6b00656
日期:2016.4.15
A radical based synthesis of a broad variety of protected enantiopure α-amino acids, including fluorinatedderivatives, is described. The radicaladdition furnishes naturally latent mercapto-α-amino acids ideally equipped for native chemical ligation.
tetrahydrofuran derivatives is reported from S-alkyl dithiocarbonates. The study of the group transfer reaction fromxanthates and alkenes afforded intermediate S-alkyl dithiocarbonates. From 2,3-dihydrofuran derivatives, the displacement of the resulting anomeric xanthates with various nucleophiles in the presence of Lewis acid allowed the formation of new carbon−carbon and carbon−heteroatom bonds