138356-92-0Relevant articles and documents
Cytotoxic activity of synthetic chiral amino acid derivatives
de Castro, Pedro P.,Siqueira, Raoni P.,Conforte, Luiza,Franco, Chris H.J.,Bressan, Gustavo C.,Amarante, Giovanni W.
, p. 193 - 200 (2019/12/28)
Cancer is a chronic degenerative disease considered one of the most important causes of death worldwide. In this context, a series of dual-protected amino acid derivatives was synthesized and evaluated as potential novel anticancer agents. The 40 derivatives were prepared in up to three reaction steps. The cytotoxic activities were screened in vitro against a panel of tumor and non-tumor cells using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Among the synthesized derivatives, three of them showed promising activity against cancer cells with half-maximal inhibitory concentration (IC50) ranging between 1.7-6.1 μM. The most promising derivative, bearing both a lipophilic N-alkyl diamine moiety and a protected amino acid scaffold showed a selectivity index of 3.4 towards tumor cells. The N-alkyl diamine moiety seems to play a crucial role in the enhancement of the anticancer activity. On the other hand, the incorporation of an amino acid scaffold resulted in increase in the selectivity towards cancer cell lines.
Direct synthesis of amides from carboxylic acids and amines using B(OCH2CF3)3
Lanigan, Rachel M.,Starkov, Pavel,Sheppard, Tom D.
, p. 4512 - 4523 (2013/06/05)
B(OCH2CF3)3, prepared from readily available B2O3 and 2,2,2-trifluoroethanol, is as an effective reagent for the direct amidation of a variety of carboxylic acids with a broad range of amines. In most cases, the amide products can be purified by a simple filtration procedure using commercially available resins, with no need for aqueous workup or chromatography. The amidation of N-protected amino acids with both primary and secondary amines proceeds effectively, with very low levels of racemization. B(OCH2CF3)3 can also be used for the formylation of a range of amines in good to excellent yield, via transamidation of dimethylformamide.
Simple highly modular acyclic amine-catalyzed direct enantioselective addition of ketones to nitro-olefins
Xu, Yongmei,Cordova, Armando
, p. 460 - 462 (2008/02/08)
Simple, highly modular primary amino acid derivatives catalyze the direct enantioselective addition of ketones to nitro-olefins with high stereocontrol and furnish the corresponding aldol products in high yield with up to >38 : 1 dr and up to 99% ee. The