Tetrazolyl enolates

Porous 1D-, 2D-, 3D-Metallo-Coordination Polymers - Tetrazolyl Enolate-,... 

Tetrazolyl Enolate-, Pyrrolidinyl Enolate-, and Semicorrinate Anions as Chelate Ligands for Iron(II) and Copper(II) Ions From Molecular to Collective Structures... 

Upon reaction of the tetrazolyl enolates 41a-c (HL18) in ether with aqueous iron(III) chloride solutions, and after addition of n-hexane, the mononuclear complexes [Fe(L18)3] (42a-c) separate as deep blue microcrystals [129, 130]. 

Reaction of tetrazolyl enole 45 with copper(II) acetate yields the 3D-coordination polymer [ CulL19)21 (46), the structure of which is unequivocally established by single-crystal X-ray diffraction. The formation of 46 is understandable if the enolate of 45 is considered as tridentate chelate ligand and if the intermediate formation of the coordinatively unsaturated self-complimentary copper(II) building block 47 is assumed. The monomers 47 are bidentate coordinating by the two CN donors, which leads to linking of monomers and to coordinative saturation at the copper(II) center of 47 with formation of three-dimensional 0 [Cu(L19)2] (46) (Scheme 17, Fig. 18) [163, 164],... 

D- and 2D-Coordination Polymers of Copper(II)-Ions from Tetrazolyl- or Pyrrolinyl Enolates... 

Recently, a new and efficient synthesis of cyprodime from naltrexone (2) has been reported [73], Firstly, the tetrazolyl ether (27) was formed by reaction of naltrexone with 5-chloro-l-phenyl-1 Ff-tetrazole [74], Catalytic hydrogenation afforded 3-deoxynaltrexone (28) which was methylated with dimethyl sulphate to give the enol ether (29). Acid hydrolysis gave the known morphinanone (30) [75] which was treated with activated zinc and ammonium chloride to yield the phenol (31). 4-O-Methylation with phenyltri-methylammonium chloride afforded cyprodime (23, Scheme 3.4) [75],... 

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