110656-00-3Relevant articles and documents
Photodecarbonylation of 2,5,5,-Trimethyl-2-(1-propynyl)cyclopentanone. 1,5- vs. 1,4-Ring Closure of a Propargyl-Alkyl Biradical
Rudolph, Andreas,Margaretha, Paul,Agosta, William C.
, p. 339 - 341 (1987)
Propargyl-alkyl biradical 12 generated by photodecarbonylation of title ketone 3 undergoes ring closure to cyclobutane 7 and to vinyl carbene 13, this latter intermediate rearranging to the 5-ethylidenecyclopentenes 8a and 8b.