96-53-7Relevant articles and documents
An environmentally benign and efficient synthesis of substituted benzothiazole-2-thiols, benzoxazole-2-thiols, and benzimidazoline-2-thiones in water
Liu, Xing,Liu, Min,Xu, Wan,Zeng, Meng-Tian,Zhu, Hui,Chang, Cai-Zhu,Dong, Zhi-Bing
, p. 5591 - 5598 (2017/12/06)
An efficient and practical method for the one-step synthesis of benzothiazole-2-thiols, benzoxazole-2-thiols and benzimidazoline-2-thiones by cyclization of 2-aminothiophenols, 2-aminophenols, and 1,2-phenylenediamines with tetramethylthiuram disulfide (TMTD) in water was described. The features of this method include metal/ligand-free, excellent yield, short reaction time and broad substrate scope. The method provides a facile and convenient preparation of some potentially biologically active compounds.
Hexadentate terephthalamide(bis-hydroxypyridinone) ligands for uranyl chelation: Structural and thermodynamic consequences of ligand variation (1)
Szigethy, Geza,Raymond, Kenneth N.
supporting information; experimental part, p. 7942 - 7956 (2011/07/06)
Several linear, hexa- and tetradentate ligands incorporating a combination of 2,3-dihydroxy-terephthalamide (TAM) and hydroxypyridinone-amide (HOPO) moieties have been developed as uranyl chelating agents. Crystallographic analysis of several {UO2[TAM(HOPO)2]}2- complexes revealed a variable and crowded coordination geometry about the uranyl center. The TAM moiety dominates the bonding in hexadenate complexes, with linker rigidity dictating the equality of equatorial U-O bonding. Hexadentate TAM(HOPO)2 ligands demonstrated slow binding kinetics with uranyl affinities on average 6 orders of magnitude greater than those of similarly linked bis-HOPO ligands. Study of tetradentate TAM(HOPO) ligands revealed that the high uranyl affinity stems primarily from the presence of the TAM moiety and only marginally from increased ligand denticity. Uranyl affinities of TAM(HOPO)2 ligands were within experimental error, with TAM(o-phen-1,2-HOPO)2 exhibiting the most consistent uranyl affinity at variable pH.
SUGAR CHEMISTRY WITHOUT PROTECTING GROUPS: A NOVEL REGIOSELECTIVE SYNTHESIS OF 6-O-ACYL-D-GLUCOPYRANOSES AND METHYL-6-O-ACYL-α-D-GLUCOPYRANOSIDES
Plusquellec, Daniel,Baczko, Krystyna
, p. 3809 - 3812 (2007/10/02)
The primary hydroxyl groups of α-D-glucose and methyl-α-D-glucoside were selectively esterified by treating the free sugars with N-acylthiazolidine-2-thiones, thus affording respectively 6-O-acyl-D-glucopyranoses and methyl-6-O-acyl-α-D-glucopyranosides in high yields.This new reaction is compared with our previous synthesis of 1-O-acyl-β-D-glucopyranoses from β-D-glucose and interpreted in terms of anomeric effect.
