80963-80-0Relevant articles and documents
Metal-Free Selective Modification of Secondary Amides: Application in Late-Stage Diversification of Peptides
Adebomi, Victor,Sriram, Mahesh,Streety, Xavier,Raj, Monika
supporting information, p. 6189 - 6193 (2021/08/01)
Here we solve a long-standing challenge of the site-selective modification of secondary amides and present a simple two-step, metal-free approach to selectively modify a particular secondary amide in molecules containing multiple primary and secondary amides. Density functional theory (DFT) provides insight into the activation of C-N bonds. This study encompasses distinct chemical advances for late-stage modification of peptides thus harnessing the amides for the incorporation of various functional groups into natural and synthetic molecules.
Novel Chiral Bifunctional L-Thiazoline-Thiourea Derivatives: Design and Application in Enantioselective Michael Reactions
Lai, Qi,Li, Yang,Gong, Zhiyong,Liu, Qingwen,Wei, Chiyu,Song, Zhiguang
, p. 979 - 988 (2015/11/16)
Several novel chiral bifunctional L-thiazoline-thiourea derivatives were easily synthesized from commercially available L-cysteine in high yield. These catalysts were subsequently applied to the enantioselective Michael addition of acetylacetone to β-nitr
Novel chiral bifunctional L-thiazoline-amide derivatives: Design and application in the direct enantioselective aldol reactions
Gong, Zhiyong,Wei, Chiyu,Shi, Ye,Zheng, Qingchuan,Song, Zhiguang,Liu, Zaiqun
, p. 1827 - 1835 (2014/03/21)
Several novel chiral bifunctional l-thiazoline-amide derivatives were simply synthesized from commercially available l-cysteine and l-proline in high yield. These catalysts were subsequently applied to the direct enantioselective aldol reactions of variou
A versatile synthesis of various substituted taurines from vicinal amino alcohols and aziridines
Chen, Ning,Jia, Weiyi,Xu, Jiaxi
supporting information; experimental part, p. 5841 - 5846 (2010/03/03)
Taurine and structurally diverse substituted taurines have been synthesized by peroxyformic acid, oxidation of the thiazolidine-2-thione intermediates generated from, vicinal amino alcohols or aziridines and carbon disulfide. The stereochemistry and mechanisms of the reactions are disscussed. The method is a salt-free and versatile route, convenient in terms of purification, and can be used to synthesize optically active substituted taurines.
The Use of Cysteine- and Serine-Derived Thiazolidinethiones and Oxazolidinethiones as Efficient Chiral Auxiliaries an Aldol Condensations
Hsiao, Chi-Nung,Liu, Li,Miller, Marvin J.
, p. 2201 - 2206 (2007/10/02)
Cysteine-derived thiazolidinethiones and serine-derived oxazolidinethiones serve as efficient chiral auxiliaries in boron- and tin-mediated aldol condensations.The condensations with a variety of simple aldehydes produced the expected erythro products in high chemical and optical yields.Additional advantages of these chiral auxiliaries were the ease of removal by methanolysis or hydroxaminolysis and their practical recyclability.
Highly Selective Nonenzymatic Chiral Induction into 3-Methylglutaric Acid and cis-4-Cyclohexen-1,2-ylenebis(acetic acid) Utilizing a Functional Five-Membered Heterocycle 4(R)-MCTT
Nagao, Yoshimitsu,Ikeda, Takao,Inoue, Takehisa,Yagi, Masahiro,Shiro, Motoo,Fujita, Eiichi
, p. 4072 - 4080 (2007/10/02)
Diamide 8, prepared by treatment of 3-methylglutaric acid (1) with 4(R)-MCTT (5) in the presence of DCC in pyridine, was subjected to aminolysis with 1 equiv of piperidine in CH2Cl2 at -30 deg C to give a mixture of diastereomers 9a and 10a in a 88:12 rat
SYNTHESIS OF 1,3-THIAZOLIDINE-2-THIONE AND (4R)-METHOXYCARBONYL-1,3-THIAZOLIDINE-2-THIONE USING N,N'-THIOCARBONYLDIIMIDAZOLE
Soai, Kenso,Ishizaki, Miyuki
, p. 2827 - 2828 (2007/10/02)
1,3-Thiazolidine-2-thiones are synthesized from β-aminothiols and N,N'-thiocarbonyldiimidazole in good yields.
A NEW CHIRAL RECOGNITION IN AMINOLYSIS OF 3-ACYL-4(R)-METHOXYCARBONYL-1,3-THIAZOLIDINE-2-THIONE WITH RACEMIC AMINES
Nagao, Yoshimitsu,Yagi, Masahiro,Ikede, Takao,Fujita, Eiichi
, p. 201 - 204 (2007/10/02)
A chiral recognition was observed in aminolysis of 3-acyl-4(R)-methoxycarbonyl-1,3-thiazolidine-2-thione 1 by racemic amine 2 to give an optically active amide (S-excess) and amine (R-excess).