The present invention generally relates to methods of inhibiting ethylene responses in plants and plant materials, and particularly relates to methods of inhibiting various ethylene responses including plant maturation and degradation, by exposing plants to cyclopropene derivatives and compositions thereof wherein: 1) at least one substituent on the cyclopropene ring contains a carbocyclic or heterocyclic ring, or 2) . a substituent contains silicon, sulfur, phosphorous, or boron, or 3) least one substituent contains from one to four non-hydrogen atoms and at least one substituent contains more than four non-hydrogen atoms.
Cyclohexyne Cycloinsertion in the Divergent Synthesis of Guanacastepenes
作者:Christian M. Gampe、Erick M. Carreira
DOI:10.1002/chem.201202222
日期:2012.12.3
studies toward the synthesis of a number of guanacastepenes. The synthetic strategy relies on the use of cyclohexyne in a cycloinsertion reaction to rapidly construct the guanacastepene core. Isolation of a cyclobutenol as intermediate in the cyclohexynecycloinsertion provided us with the possibility to study further the reactivity of this metastable compound, and we uncovered novel rearrangements and