L'etude est faite sur desvinylallenes comme le benzosulfinyl-3' allenyl-1 trimethyl-2,6,6 cyclohexene。Le groupe sulfoxyde est un substituant qui non seulement exerce uneceleration du deplacement [1,5] mais aussi peut egalement Impacter le controle de lastereoselection π-faciale dans cessyntheses de trienes
Selective cis-trans isomerization of a tetraene via an allene intermediate. Geometric isomerism via an sp2 to sp2 sigmatropic hydrogen shift and kinetic isotope effect studies
作者:J. Antonio Palenzuela、Hassan Y. Elnagar、William H. Okamura
DOI:10.1021/ja00187a032
日期:1989.3
allene 6. The allene 6 could in fact be isolated in the case of the isomerization of 9, and moreover, at long reaction times 6 and 9 are transformed to 10. For the isomerization of 5 to 7 plus 8, it was shown that 7 and 8 interconvert with one another, but it is unclear whether allene 5 is an intermediate in their interconversion. The temperature dependencies of the primary deuterium kinetic isotope effects