A Photochemical Source of Real Alkylcarbenes

Article abstract of DOI:10.1016/00404-0399(50)1113V-

Treatment of 7,7-dibromodibenzobicyclo<4.1.0>heptane with di-tert-butylcuprate or dibutylcuprate, followed by quenching with water, led to exo- and endo-7-monoalkyldibenzobicyclo<4.1.0>heptanes.Photolysis through either quartz or Pyrex gave the products of intramolecular reactions of the corresponding alkylcarbenes.The temperature dependence of the products formed from tert-butylcarbene was verified, and butylcarbene was trapped intermolecularly. - Keywords: carbenes, retrocycloadditions, insertion reactions.