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The six-membered saturated heterocycles—4-tert-butyl-1-methylpiperidine, 4-tert-butyl-1-methylphosphine, 4-tert-butyl-tetrahydro-2H-thiopyran, and 4-tert-butyl-tetrahydro-2H-selenopyran—were prepared as suitable model compounds with well-defined geometry for an NMR study of their oxidation products. The corresponding epimeric N-oxides, phosphinoxides, sulfoxides, and selenoxides were obtained by standard...
The synthesis of asymmetric diester derivatives of pyridyl-tetrazole ligands was successfully undertaken. Five crystal structures are reported including three asymmetric diesters (one of which is a mixed methyl ethyl ester derivative), a dicarboxylic acid and a monosodium (dicarboxylic acid)(monoacid-carboxylate) dihydrate intermediate. The dicarboxylic acid assembles by an unusual and unexpected...
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