Regiochemical Trends in Intramolecular [2 + 2] Photocycloadditions of 6-(prop-2-enyl)cyclohex-2-enones and 5-(prop-2-enyl)cyclopent-2-enones
作者:Giuliano Cruciani、Paul Margaretha
DOI:10.1002/hlca.19900730208
日期:1990.3.14
cyclization becomes low enough so that lumiketone rearrangement to bicyclohexanones 6 and 3-isopropylcyclopent-2-enones 9 becomes competitive. Enones 9 undergo consecutive intramolecular [2 + 2] photocycloaddition to tricyclo[3.2.1.03,6]octan-2-ones 7 and to tricyclo[3.2.1.03,6]octan-7-ones 8, compounds 8 only being formed when R Me.
CRUCIANI, GIULIANO;MARGARETHA, PAUL, HELV. ACTA ACTA., 73,(1990) N, C. 288-297
作者:CRUCIANI, GIULIANO、MARGARETHA, PAUL
DOI:——
日期:——
PONARAS, ANTHONY A.;ZAIM, OMER;PAZO, YESSICA;OHANNESIAN, LENA, J. ORG. CHEM., 53,(1988) N 5, 1110-1112
作者:PONARAS, ANTHONY A.、ZAIM, OMER、PAZO, YESSICA、OHANNESIAN, LENA
DOI:——
日期:——
Synthetic elaboration of diosphenols. Part 3. Replacement of enolic oxygen by hydrogen
作者:Anthony A. Ponaras、Omer Zaim、Yessica Pazo、Lena Ohannesian
DOI:10.1021/jo00240a039
日期:1988.3
Intramolecular [2 + 2]-Photocycloadditions of 6-Allyl-2-cyclohexenones. Formation of Tricyclo[3.3.1.0<sup>2,7</sup>]nonan-6-ones and Tricyclo[4.2.1.0<sup>3,8</sup>]nonan-7-ones
作者:Wolfgang Fröstl、Paul Margaretha
DOI:10.1002/hlca.19760590639
日期:——
Alkylation of 4,4,6-trimethyl-2-cyclohexenone (1) in toluene in the presence of sodium bis(trimethylsilyl)amide proceeds smoothly to give high yields of compounds 2. Irradiation (λ= 366 nm) of the 6-allyl-4,4,6-trimethyl-2-cyclohexenones 2a–c yields mixtures of the isomeric tricyclo-nonanones 3 and 4, the product ratio depending on the substituent R' of the allylic side chain and on the solvent. The