Orthocyclophanes. 3. Ketonands, Novel Ketonic Crowns of Polyoxo[1n]orthocyclophane Constitution
摘要:
Synthetic studies of a new family of novel ketonic macrocycles are reported. Exhaustive oxidation of all of the methylenes in odd-numbered [1(n)]orthocyclophanes ([1(n)]OCPs) resulted in the polyoxo derivatives of a cyclopolyorthobenzoyl or polyoxo[1(n)]orthocyclophane constitution. This new class of ketonic crowns is referred to as [1(n)]orthocyclophanepolyones and includes [1(5)] orthocyclophane-pentaone, [1(7)]orthocyclophaneheptaone, and [1(9)]orthocyclophanenonaone. We suggest the generic name ''ketonands'' for these ketonic crowns. Structures of ketonands were confirmed by spectral and X-ray crystallographic analyses.
Orthocyclophanes. 1. Synthesis and characterization of [14]- and [15]orthocyclophanes and bicyclic biscyclophanes
摘要:
[1(4)]- and [1(5)]orthocyclophanes have been designed, synthesized and characterized. Dimetalation of bis(2-bromophenyl)methane (14) to the corresponding dilithio reagent 21, followed by reaction with aromatic dialdehydes bis(2-formylphenyl)methane (20) and 1,2-bis(2-formylbenzyl)benzene (27), gave cyclic diols 22 and 28, respectively. Oxidation of the diols with PCC to the corresponding cyclic diketones 23 and 29, followed by palladium-catalyzed reduction, afforded [1(4)]- and [1(5)]orthocyclophanes, 4 and 5. Bicyclic biscyclophanes were also prepared from the cyclic diketones giving rise to a new family of cyclophanes. Treatment of 23 and 29, respectively, with McMurry or Clemmensen reagents gave rise to intramolecular olefination to provide bicyclic biscyclophanes 24 and 30. Pd-catalyzed hydrogenation of 24 and 30 also gave 4 and 5. The benzylic positions of the cycloheptatriene moieties in 24 and 30 were very susceptible to oxidation to give ketones 26 and 32.
Lee Woo Young, Park Chang Hee, Kim Hyo-Joong, Kim Sangsoo, J. Org. Chem, 59 (1994) N 4, S 878-884
作者:Lee Woo Young, Park Chang Hee, Kim Hyo-Joong, Kim Sangsoo
DOI:——
日期:——
Orthocyclophanes. 1. Synthesis and characterization of [14]- and [15]orthocyclophanes and bicyclic biscyclophanes
作者:Woo Young Lee、Chang Hee Park、Young Dong Kim
DOI:10.1021/jo00041a007
日期:1992.7
[1(4)]- and [1(5)]orthocyclophanes have been designed, synthesized and characterized. Dimetalation of bis(2-bromophenyl)methane (14) to the corresponding dilithio reagent 21, followed by reaction with aromatic dialdehydes bis(2-formylphenyl)methane (20) and 1,2-bis(2-formylbenzyl)benzene (27), gave cyclic diols 22 and 28, respectively. Oxidation of the diols with PCC to the corresponding cyclic diketones 23 and 29, followed by palladium-catalyzed reduction, afforded [1(4)]- and [1(5)]orthocyclophanes, 4 and 5. Bicyclic biscyclophanes were also prepared from the cyclic diketones giving rise to a new family of cyclophanes. Treatment of 23 and 29, respectively, with McMurry or Clemmensen reagents gave rise to intramolecular olefination to provide bicyclic biscyclophanes 24 and 30. Pd-catalyzed hydrogenation of 24 and 30 also gave 4 and 5. The benzylic positions of the cycloheptatriene moieties in 24 and 30 were very susceptible to oxidation to give ketones 26 and 32.
Orthocyclophanes. 3. Ketonands, Novel Ketonic Crowns of Polyoxo[1n]orthocyclophane Constitution
作者:Woo Young Lee、Chang Hee Park、Hyo-Joong Kim、Sangsoo Kim
DOI:10.1021/jo00083a033
日期:1994.2
Synthetic studies of a new family of novel ketonic macrocycles are reported. Exhaustive oxidation of all of the methylenes in odd-numbered [1(n)]orthocyclophanes ([1(n)]OCPs) resulted in the polyoxo derivatives of a cyclopolyorthobenzoyl or polyoxo[1(n)]orthocyclophane constitution. This new class of ketonic crowns is referred to as [1(n)]orthocyclophanepolyones and includes [1(5)] orthocyclophane-pentaone, [1(7)]orthocyclophaneheptaone, and [1(9)]orthocyclophanenonaone. We suggest the generic name ''ketonands'' for these ketonic crowns. Structures of ketonands were confirmed by spectral and X-ray crystallographic analyses.