Rogelio Jiménez Jiménez

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BACKGROUND The proton at position 5 of imidazo[1,2-a]pyridines substituted with an angular electron withdrawing group (EWG) at position 3, shows an unusual downfield chemical shift, which is usually explained in terms of a peri effect. However usage of this term is sometimes confusing. In this investigation, it is proposed that the aforementioned shift is(More)
An expeditious synthesis of 5,7-dihydroxy-6-methylphthalide from open-chain precursors is described. The key intermediates, synthons 3 and 4, were readily obtained from accessible materials and were further transformed to a common precursor, a five-membered lactone derivative, via an intramolecular Michael addition. Lactone 2 was aromatised to the phthalide(More)
At this moment, mobile communications operators are starting to develope third generation network with UMTS technology. In many cases, this technology will be placed in facilities already used by other systems, specially GSM network, so, problems such electromagnetic compatibility and exposure limits regulations values should be carefully studied before(More)
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