Synthesis of 9,10-Phenanthrenequinones by Photocyclization of Derivatives of Benzoins: Scope and Limitation of the Methodology
摘要:
Symmetric 9,10-phenanthrenequinones with methyl, methoxy, and chloro substituents at the 3 and 6 positions have been synthesized by photocyclization of 4,5-bis-(aryl)-2-phenyl-1,3,2-dioxaboroles and 2,3-diaryldioxenes followed by oxidative hydrolysis.
Mechanisms of photooxygenation. 1. Substituent effects on the [2 + 2] cycloaddition of singlet oxygen to vinyl ethers
作者:K. A. Zaklika、Bashir Kaskar、A. Paul Schaap
DOI:10.1021/ja00521a072
日期:1980.1
Mechanisms of photooxygenation. 2. Formation of 1,2-dioxetanes via 9,10-dicyanoanthracene-sensitized electron-transfer processes
作者:A. Paul Schaap、K. A. Zaklika、Bashir Kaskar、L. W. M. Fung
DOI:10.1021/ja00521a073
日期:1980.1
SCHAAP, A. P.;GAGNON, S. D.;ZAKLIKA, K. A., TETRAHEDRON LETT., 1982, 23, N 29, 2943-2946
作者:SCHAAP, A. P.、GAGNON, S. D.、ZAKLIKA, K. A.
DOI:——
日期:——
Synthesis of 9,10-Phenanthrenequinones by Photocyclization of Derivatives of Benzoins: Scope and Limitation of the Methodology
作者:Denisio Masaharu Togashi、David Ernest Nicodem∗、Roberto Marchiori、Maria Luisa P. de F. C. Marchiori
DOI:10.1080/00397919808003073
日期:1998.3.1
Symmetric 9,10-phenanthrenequinones with methyl, methoxy, and chloro substituents at the 3 and 6 positions have been synthesized by photocyclization of 4,5-bis-(aryl)-2-phenyl-1,3,2-dioxaboroles and 2,3-diaryldioxenes followed by oxidative hydrolysis.
Substituent effects on the decomposition of 1,2-dioxetanes: a Hammett correlation for substituted 1,6-diaryl-2,5,7,8-tetraoxabicyclo[4.2.0]octanes
作者:A.Paul Schaap、Steven D. Gagnon、K.A. Zaklika
DOI:10.1016/s0040-4039(00)87500-0
日期:1982.1
Rates of decomposition for 1,2-dioxetanes obtained from addition of singlet oxygen to substituted 2,3-diaryl-1,4-dioxenes have been found to obey a Hammett relationship with ϱ+ = −0.24 (n = 15, r = 0.92). The results are taken as support for a biradical mechanism.