Alexander V. Sienkiewicz*, Anatoliy A. Kapshuk Department of Chemistry, University of Kiev, 252017 Kiev, Ukraine Z. Naturforsch. 49b, 441-444 (1994); received September 13,1993 X-Ray, Antimony Trichloride-Phosphoryl Isothiocyanate The crystal and molecular structure of the tetrameric complex of the composition [SbCl3-OP(NCS)3]4 synthesized from SbCl3 and OP(NCS)3 in CC14 waso determined by X-ra...

an efficient and simple one-pot approach for the synthesis of 3,4-dihydropyrimidin-2-(1h)-one derivatives using antimony trichloride (sbcl3) as a mild catalyst by means of three-component biginelli reaction between β-keto esters, aldehyde derivatives and urea/thiourea under thermal and solvent-free conditions with excellent yields and short reaction times is reported. this methodology offers se...

In a previous paper of this series (1) we have shown that while the dilution curve for cod liver oil with antimony trichloride is not a linear function, a comparison can be made between the colorimetric assay of vitamin A in certain fish oils, with a chloroform solution of antimony trichloride, and the biological assay upon the same oils, when certain precautions are taken. In a second paper (2...

A simple, efficient, and mild procedure for a solvent-free one-step synthesis of various 4,4'-diaminotriarylmethane derivatives in the presence of antimony trichloride as catalyst is described. Triarylmethane derivatives were prepared in good to excellent yields and characterized by elemental analysis, FTIR, (1)H and (13)C NMR spectroscopic techniques. The structural and vibrational analysis we...

IN the first paper of this series an account was given of some sterol tests in which blue colours were obtained very similar in appearance to those given by arsenic trichloride or antimony trichloride with cod-liver oil, and attributed to vitamin A. On account of this close resemblance, it appeared desirable next to undertake a spectroscopic study of the "vitamin" colours with the object of dis...

an additional, slightly delayed onset of gastro-intestinal disturbance including abdominal pain and persistent anorexia. Urine antimony estimations revealed a concentration in excess of i mg./litre in these five men. Environmental measurements suggest that they were briefly exposed to air containing up to 146 mg. hydrochloric acid and 73 mg. antimony per m.3 expressed as the metal. These findin...

The ultraviolet absorption spectrum of vitamin A with itsmaximum near 328 m,. was described nearly 20 years ago (Morton & Heilbron, 1928a, b). The intensity of absorption shown at that wave length by a fish-liver oil or concentrate was conveniently expressed in terms of E "lo 328 m,u. (Gillam & Morton, 1929), and this magnitude was early seen to afford a guide to potency. If a number of fish-li...

Since Zaffaroni (1949, 1950, 1951) succeeded in separating free steroids with the use of paper chromatography, attempts have been done to gain useful technics for the development of steroids on the paper. Neher and Wettstein (1951a, b) and Bush (1952) introduced a technic, in which fluorescent reaction of steroids was observed either in saturated chloroform solution with antimony trichloride, o...