Roberto Ballini,† Noelia Arauj́o,‡ María V. Gil, Emilio Romań,* and Jose ́ A. Serrano †School of Science and Technology, Chemistry Division, via S. Agostino 1, I-62032 Camerino, Italy ‡Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, United Kingdom Departamento de Química Orgańica e Inorgańica, Facultad de Ciencias, Universidad de Extremadura, 06071 Badajoz, Spain

Conjugated nitrodienes. Synthesis and reactivity.

The main methods of the synthesis of nitrobutadienes and their halogen derivatives, which are multipurpose electrophiles, are surveyed. The literature data on their chemical transformations are generalised, the possibilities for the preparation of new polyfunctional derivatives of different classes on the basis of nitro- and halo-nitrobutadienes that have been inaccessible earlier are demonstrated. The bibliography includes 112 references.

Nitrobutadienes and their halogen derivatives: synthesis and reactions

Synthetic Exploitation of the Ring-Opening of 3,4- Dinitrothiophene. A Novel Access to 1,4-Dialkyl- and 1,4- Diaryl-2,3-Dinitro-1,3-Butadienes

Polyacetylenes, terpenoids and flavonoids from Bupleurum spinosum

Methods of preparation of α-halogenonitroalkanes and their functional derivatives are surveyed, together with the chief results obtained for the geometric parameters, electronic structure, and ultraviolet, infrared, and nuclear magnetic and quadrupole resonance spectroscopy, as well as acid–base properties. Reactions involving reduction, addition at multiple bonds, substitution of halogen atoms and the nitro-group, and interaction with diazoalkanes are analysed, and the most important mechanisms are discussed. Data are given on the toxicity, physiological activity, and practical use of these compounds. A list of 316 references is included.

H. W. Spurr

Papers

Synthesis and microbial toxicity of dinitrobutadienes and related compounds

Synth. und mikrobielle toxizitaet von dinitrobutadienen und verwandten verbindungen