Rearrangement of the Diels–Alder adduct of azodibenzoyl and cyclopentadiene
作者:Donald Mackay、J. A. Campbell、C. P. R. Jennison
DOI:10.1139/v70-013
日期:1970.1.1
the Diels–Alderadduct 1 of azodibenzoyl and cyclopentadiene has been identified by degradation and nuclear magnetic resonance analysis as the cis-bicyclic oxadiazine 2a, the dihydro derivative of which has been synthesized. The isomerization is quantitative and is first order throughout in solution in a range of solvents ; kinetic and other evidence point to it being a sigmatropic rearrangement.
The hetero Diels-Alder adducts 1 derived from azodibenzoyl and cyclic dienes were transformed to the meso-diaminodicarboxylic acids 6 via the new cyclic hydrazoacetic acids 3.
The hetero Diels-Alder adducts 6a-d derived from azodibenzoyl and cyclic dienes were oxidized by ruthenium tetroxide and transformed into meso-diaminodicarboxylic acids 12a-d via the new cyclic hydrazoacetic acids 9a-d.