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The one-step preparation of 1-nitrobicyclo[3.1.0]­hexane and bicycloisoxazoline-<i>N</i>-oxide was readily achieved from conjugate adducts of nitro alkenes and allylmalonates by treatment with Ag₂O and iodine under basic conditions. We observed that when a primary alkyl group was present at the β-position of the nitro group, bicyclo[3.1.0]­hexane was preferentially formed, whereas if a secondary alkyl group occupied that position, isoxazoline-<i>N</i>-oxide was predominantly produced. High <i>cis</i>-selectivity was observed for the formation of cyclopentane units for both reactions. An iodomethyl adduct, considered an intermediate of the cyclization, was isolated, and its conversion to isoxazoline-<i>N</i>-oxide was successfully achieved. The isoxazoline-<i>N</i>-oxide underwent 1,3-dipolar cycloaddition with alkenes to yield tricycloheterocyclic compounds, which were readily converted to spirolactam in good yield by reductive cleavage of N–O bonds using Raney-Ni. On the other hand, 1,3-dipolar cycloaddition of the isoxazoline-<i>N</i>-oxide to terminal alkynes yielded tricyclic aziridines stereoselectively

Multi-omics analysis on an agroecosystem reveals the significant role of organic nitrogen to increase agricultural crop yield

journal articl

Preparation of SRN1-Type Coupling Adducts from Aliphatic gem-Dinitro Compounds in Ionic Liquids

molecule

Instability Observed in InP (MIS) Schottky Barrier Solar Cells

Instabilities have been observed in the electric and photovoltaic characteristics of InP (MIS) Schottky barrier solar cells. The degradation has been more serious for n-type sample than for p-type sample. The degradation in n-type sample seems to be caused by the decrease of the barrier height and in p-type sample, it seems to be explained in terms of the increase in sheet resistance of the gate metal. </jats:p