Photoinduced atom-transfer cyclization of alpha-iodocycloalkanones bearing an allenyl side chain.
[reaction: see text] Irradiation of alpha-iodocycloalkanones bearing an allenyl side chain with a sunlamp effected atom-transfer cyclization to give cyclized products in good yield. A mechanism, involving radical atom-transfer cyclization accompanied by 1,5- and 1,4-hydrogen transfers, is proposed.
Lin
Hsien-Hsun
HH
Department of Chemistry, National Tsing Hua University, Hsinchu 300, Taiwan, ROC.
Chang
Wen-Sheng
WS
Luo
Shun-Yuan
SY
Sha
Chin-Kang
CK