Fifteen novel β-lactams bearing the N-ethyl tert-butyl carbamate group 5a-o and fifteen N-(2-aminoethyl) β-lactams 6a-o were synthesized by the ketene-imine [2+2] cycloaddition reaction (Staudinger ). The cycloaddition reaction was found to be totally diastereoselective leading exclusively to the formation of the cis-β-lactam derivatives. These newly synthesized β-lactams were evaluated for the...

Fifteen novel β-lactams bearing the N-ethyl tert-butyl carbamate group 5a-o and fifteen N-(2-aminoethyl) β-lactams 6a-o were synthesized by the ketene-imine [2+2] cycloaddition reaction (Staudinger ). The cycloaddition reaction was found to be totally diastereoselective leading exclusively to the formation of the cis-β-lactam derivatives. These newly synthesized β-lactams were evaluated for the...

Se aportan registros de Heterocera interés para España peninsular y Melilla, algunos ellos por primera vez, como Pammene gallicolana (Lienig & Zeller, 1846), Epinotia cruciana (Linnaeus, 1761), Elachista pollutella Duponchel, 1842 [1843] Ceuta Melilla a Streblote panda Hübner, [1820] 1816, Laothoe austanti (Staudinger, 1877), Hyles tithymali mauretanica 1871), Hippotion celerio 1758), Cymba...

Capitalizing on a recently reported iminosugar-based aza-crown (ISAC) accessed by double Staudinger azaWittig coupling reaction, we have expanded the structural diversity of this new family sweet cyclam analogs. Replacement two secondary amines linking iminosugar units amide bonds obtained cyclodimerization with BOP and DIPEA led to macrocycle that did not demonstrate efficient Zn2+ chelation u...

The West Palaearctic genus Nothris is reviewed. Eight species are distinguished, and adults and genitalia are described and figured. Two species are described as new for science: Nothris gregerseni sp. n. and N. skyvai sp. n. New synonymies are established: Nothris discretella Rebel, 1889 syn. n. and N. verbascella clarella Amsel, 1935 stat. n. are considered synonyms of N. verbascella ([Denis ...