An example of a ground state tri-pi -methane rearrangement is described. (C) 2000 Elsevier Science Ltd. All rights reserved.
Excited- and Ground-State Versions of the Tri-π-methane Rearrangement: Mechanistic and Exploratory Organic Photochemistry<sup>1</sup>
作者:Howard E. Zimmerman、Vladimír Církva
DOI:10.1021/jo001601b
日期:2001.3.1
Since both three-ring and five-ring photoproducts often are found to be produced, it was important to establish that the observed photochemistry was really the result of a true single-step tri-pi-methane rearrangement and not the consequence of two sequential rearrangements, first to form a vinyl cyclopropane which subsequently ring expanded to the cyclopentene. The general situation has three species-A