Weygand,F. et al., Chemische Berichte, 1964, vol. 97, p. 2023 - 2028
作者:Weygand,F. et al.
DOI:——
日期:——
Gas chromatographic and mass spectrometric characteristics of 2-trifluoromethyl-3-oxazol-5-ones. A potentially useful derivative for α-amino acids
作者:V. Ferrito、R. Borg、J. Eagles、G. R. Fenwick
DOI:10.1002/bms.1200061108
日期:1979.11
AUSTEL V.; STEGLICH W., CHEM. BER. <CHBE-AM>, 1975, 108, NO 7, 2361-2367
作者:AUSTEL V.、 STEGLICH W.
DOI:——
日期:——
<i>Cinchona</i> Alkaloid Catalyzed Sulfa-Michael Addition Reactions Leading to Enantiopure β-Functionalized Cysteines
作者:Arjen C. Breman、Suze E. M. Telderman、Roy P. M. van Santen、Jamie I. Scott、Jan H. van Maarseveen、Steen Ingemann、Henk Hiemstra
DOI:10.1021/acs.joc.5b01660
日期:2015.11.6
Sulfa-Michael additions to α,β-unsaturated N-acylated oxazolidin-2-ones and related α,β-unsaturated α-amino acid derivatives have been enantioselectivelycatalyzed by Cinchonaalkaloids functionalized with a hydrogen bond donating group at the C6′ position. The series of Cinchonaalkaloids includes known C6′ (thio)urea and sulfonamide derivatives and several novel species with a benzimidazole, squaramide
Enantioselective Organocatalytic Thiol Addition to α,β-Unsaturated α-Amino Acid Derivatives
作者:Henk Hiemstra、Arjen Breman、Jan Smits、Rene de Gelder、Jan van Maarseveen、Steen Ingemann
DOI:10.1055/s-0032-1317081
日期:——
A new class of Michael acceptors based on α,β-unsaturated amino acids has been prepared and applied in asymmetric organocatalysis. With the use of thiourea derivatives of cinchona alkaloid-derived catalysts, efficient addition of thiols to the dehydroamino acids occurred with formation of β-thiol functionalized α-amino acids in high yields, moderate diastereoselectivities and ee values up to 95%
一类基于α,β-不饱和氨基酸的新型迈克尔受体已被制备并应用于不对称有机催化。使用金鸡纳生物碱衍生催化剂的硫脲衍生物,硫醇有效加成到脱氢氨基酸中,以高产率、中等非对映选择性和高达 95% 的 ee 值形成 β-硫醇官能化的 α-氨基酸。