J. K. Stille,* T. A. Rettig, and EW Kuemmerle, Jr. ... Department of Chemistry, University of Iowa Iowa City, Iowa 52242 Received July 28,1975 ... (13) in tert- butyl alcohol gave tert-butyl3-cyano- ... 6-methylhepta-3,5-dienoate (19). Irradiation of 13 in moist tert- butyl alcohol yielded, in addition to 19, (3-methyl- 2-buteny1idene)succinimide (14) and 3-carbamoyl-6-methylhepta -3,5-dienoic ... The intramolecular photorearrangements of 2,5-cyclo- hexadienones in ...