3725-32-4Relevant academic research and scientific papers
STRAINED CYCLOALKENYNES
Meier, Herbert,Hanold, Norbert,Molz, Thomas,Bissinger, Hans Joachim,Kolshorn, Heinz,Zountsas, Johannes
, p. 1711 - 1720 (2007/10/02)
Presently known strained cycloalkynes with one, two or three additional cis- or trans-configurated double bonds are summarized in Table 3.The main topics of the article are the geometrical ring strain, the preparation or in situ generation of these compounds by fragmentation of the corresponding 1,2,3-selendiazoles, and the thermal isomerisation processes performed at room temperature or in flash pyrolysis experiments at 440-640 deg C.
Synthesis and Characterization of Representative Octa-1,3,5,7-tetraenes and Deca-1,3,5,7,9-pentaenes
Spangler, Charles W.,Little, David A.
, p. 2379 - 2386 (2007/10/02)
Several representative conjugated linear tetraenes and pentaenes were prepared by a variety of synthetic methods including Wittig condensation, 1,8-Diazabicycloundec-7-ene (DBU)-induced dehydrobromination, and Hofmann elimination.For the preparation of (E,E)- and (Z,E)-octa-1,3,5,7-tetraene, the Hofmann elimination sequence is by far the most convenient method by synthesis, while DBU-induced dehydrobromination of (E,E)-4-bromonona-1,5,7-triene, produces excellent yields of (E,E,E)- and (3Z,5E,7E)-nona-1,3,5,7-tetraene.Deca-1,3,5,7,9-pentaene can be produced by several methods, but not in high yield.Undeca-1,3,5,7,9-pentaene and trideca-1,3,5,7,9,11-hexaene can also be prepared in low yield by the Wittig reaction.All the polyenes produced in this study polymerize rapidly in the crystalline state.
