Tribenzyl tin(IV) chloride complexes of morpholine N-thiohydrazide (L-1), aniline-N-thiohydrazide (L-2), N-(morpholine-N-thio)-1,3-propanediamine (L-3) and (aniline-N-thio)-1,3-propanediamine (L-4) of the type (C6H5CH2)(3)Sn(L)Cl (where L=L-1, L-2, L-3 and L-4) have been synthesised in dioxane and in H2O and acetone mixture. These were characterized by C,H,N-analysis, UV, IR and (HNMR)-H-1 spectral studies. In both the complexes ligands act as bidentate, coordinating through sulphur and terminal nitrogen. The complexes are 1:1 metal ligand complexes. Various thermodynamic parameters have been calculated for the decomposition steps using TG/DTA curves in air as well as nitrogen atmosphere.
Methyl α-d-glucopyranoside based monoaza-15-crown-5 type lariat ethers with different heteroatom-containing side arm attached to the nitrogen of the macrocyclic ring have been synthesized. These compounds were used as chiral phase transfer catalysts in a few asymmetric reactions, such as Michael additions, Darzens condensation, and epoxidation of chalcone. The side arms of the macrocycles had a significant
Starting from the thiacalix[4]arene tetraacetate, novel derivatives bearing four ureido or thioureido functions on the lower rim have been prepared. As proven by NMR titrations, these compounds can bind anions via hydrogen bonding interactions and represent the first example of anion receptors in the thiacalixarene series. (C) 2004 Elsevier Ltd. All rights reserved.
INHIBITOR COMPOUNDS OF 11-BETA-HYDROXYSTEROID DEHYDROGENASE TYPE 1