Toyama Chemical Company, Chemical Abstracts, 100:68066q (1984). |
Tetrahedron Letters, 1973, 3719, Aue et al., "Additions to Cyclobutenes: Synthesis of 5-Azabicyclo[2.1.0]Pentanes, 2-Azabicyclo[2.2.0]Hexanes, and 1-Azaspiro[3.3]Heptanes". |
Manhas et al., Tetrahedron, 25:4421 (1969), "Studies on Lactams-XII". |
Bose et al., Tetrahedron, 37:2321 (1981). |
Hassan et al., Zh. Naturforsch, 33b:1515 (1978), "Synthesis of Some New Spiro Heterocyclic Nitrogen Compounds, II". |
Hassan et al., J. Prakt. Chemie, 321:870 (1979), "A Convenient Synthesis of Spiro Heterocyclic Compounds". |
Bose et al., Tetrahedron Letters, 40:3547 (1974), ".beta.-Lactams via Cycloaddition to Iminomalonates". |