essentially to a mixture of the expected ether, 9-phenoxy (or alkoxy)-10-methyl anthracene 2, normal substitution product (NSP), and of the isomer ether, 9-phenoxymethyl (or alkoxymethyl)-anthracene 3, tele-substitution product (TSP). It is shown that both ethers must derive from a common unstable intermediate, the 9-bromo-10-methylene-9,10-dihydroanthracene 8, coming from 1 by a prototropic shift and which can
Nanosized Particles of Organically Modified Silica as Microreactors to Enhance the Regioselectivity in the Photocycloaddition of 9-Substituted Anthracenes
have been prepared and successfully used as microreactors to control the regioselectivity of the photocycloaddition of five 9-substituted anthracences [AnCH(2)N(+)(CH(3))(3)Br(-) (1), AnCH(2)COO(-)Na(+) (2), AnCH(2)CH(2)COOH (3), AnCH(2)OH (4), AnCH(3) (5), where An = 9-anthryl]. While the photocycloaddition of the five substrates in methanol mainly gave rise to their head-to-tail (h-t) photocyclomers
RIGAUDY, J.;SEULEIMAN, A. M.;CUONG, NGUYEN, KIM, TETRAHEDRON, 1982, 38, N 21, 3143-3150
作者:RIGAUDY, J.、SEULEIMAN, A. M.、CUONG, NGUYEN, KIM
DOI:——
日期:——
Regioselectivity in the Photocycloaddition of 9-Substituted Anthracenes Incorporated within Nafion Membranes
作者:Chen-Ho Tung、Jing-Qu Guan
DOI:10.1021/jo980412e
日期:1998.8.1
The photocycloaddition of five 9-substituted anthracenes [AnCH(2)N(+)(CH(3))(3)Br(-) (1), AnCH(2)COO(-)Na(+) (2), AnCH(2)OH (3), AnCOCH(3) (4), and AnCH(3) (5), An = 9-anthryl] incorporated within Nafion membranes has been investigated. While irradiation of the above compounds in homogeneous solutions, and 5 in Nafion also, mainly gave rise to their head-to-tail (h-t) photocyclomers, photoirradiation
The photocycloaddition of five 9-substituted anthracenes [AnCH2N+(CH3)3Br− (1), AnCH2COONa (2), AnCH2OH (3), AnCOCH3 (4), AnCH3 (5), An=9-anthryl] incorporated in water-in-oil microemulsions prepared from sodium bis(2-ethylhexyl) sulfosuccinate (AOT), methylene chloride and water has been investigated. While irradiation of the above substrates in methylene chloride, and 5 in the microemulsions also