TPS-C1

Dark green vegetables Blanch leaves in boiling water. Homogenize with water containing 0.5% ascorbic acid. Extract an aliquot of the resultant mixture with acetone/ petroleum ether (3 2) containing 0.5% BHT by shaking for 10 min. Reextract until colorless (3 extractions). Saponify (ambient) the combined solvent extracts. Vydac 201 TP Clg 5 /zm 250 X 4.6 mm MeOH/CH,C1,/ H,0, 80 15.2 4.8 A ]-trans-, 9-cis-, 13-cis-/3-carotene, all-trans-a-carotene Vis 450 mn 177... 

Tp Ta(=CHBut)X2 (X = C1, Br Tp = hydrotris(3,5-dimethylpyrazol-l-yl)borate) were prepared by reaction of KTp with Ta(=CHBu )X3(thf)2 in thf. A number of Tp -supported complexes containing five-membered niobacycles have been prepared from Nb111 precursors with a coordinated alkyne ligand (see, e.g., Scheme 5).47-50... 

Caf,Tb,Tp,lMeX,3MeX, Prednisolone 7MeX,paraX Assay caf metabolites in plasma (Table 11.4) Lichrosorb Si60 5 250x3 CH C1(0-02g NH.formate and 0.6l72ul 97% HCOOH in 100 ml MeOH)(978 22) 67... 

Recently. Alvarado et al. reported a related set of active catalysts for quinoline hydrogenation, formed in situ by addition of pyrazolylborate ligands Tp, hydrotris(pyrazolyl)borate and Tp. hydrotris(3,5-dimethylpyrazolyl)borate -which are isolectronic with cyclopentadienyl ligands- to [M(COD)C1]2 (M = Rh, Ir, COD = 1,5-cyclooctadiene), [Ir(COE)Cll2 (COE = cyclooctenc), and RuCl2(NCMe)4. Again, rhodium turned out to be the most efficient metal, and the activity was related with the ease of formation of Tp or Tp complexes. No mechanistic details were provided [101]. 

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