Browsing by Author "Delgado Castro, Tomás"
Now showing items 1-17 of 17
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Araya Maturana, Ramiro; Cardona, Wilson; Delgado Castro, Tomás; Jullian Matthaei, Carolina (2000)The 1H and 13C NMR spectra of a set of structurally related tricyclic quinones consisting of 4,4-dimethylanthracene-1,9,10(4H)-trione (1), 4,4,6,7-tetramethylanthracene-1,9,10(4H)-trione (2) and the regioisomers 4,4,5-(3), ...
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Araya Maturana, Ramiro; Cassels Niven, Bruce; Delgado Castro, Tomás; Hurtado Guzmán, Claudio; Jullian Matthaei, Carolina (1999)The regiosomeric quinones 5-acetyloxymethyl-4,4,8-trimethyl-(5) and 8-acetyloxymethyl-4,4,5-trimethylanthracene-1,9,10(4H)-trione (6) were synthesized and their regiochemistry was assigned on the basis of the unambiguous ...
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Araya Maturana, Ramiro; Cardona, Wilson; Delgado Castro, Tomás; Jullian Matthaei, Carolina (JOHN WILEY & SONS LTD, 2000-02)The H-1 and C-13 NMR spectra of a set of structurally related tricyclic quinones consisting of 4,4-dimethylanthracene-1,9,10(4H)-trione (1), 4,4,6,7-tetramethylanthracene-1,9,10(4H)-trione (2) and the regioisomers 4,4,5- ...
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Araya Maturana, Ramiro; Cassels Niven, Bruce; Delgado Castro, Tomás; Hurtado Guzmán, Claudio; Jullian Matthaei, Carolina (JOHN WILEY & SONS LTD, 1999-04)The regiosomeric quinones 5-acetyloxymethyl-4,4,8-trimethyl- (5) and 8-acetyloxymethyl-4,4,5-trimethylanthracene-1,9,10(4H)-trione (6) were synthesized and their regiochemistry was assigned on the basis of the unambiguous ...
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Barahona Huenchumil, Patricia Mabel; Manríquez Castro, Víctor; Araya Maturana, Ramiro; Castañeda Magliona, Fernando; Delgado Castro, Tomás; Wittke Günther, Oscar (SOCIEDAD CHILENA DE QUIMICA, 1998-12)The crystal structure of C42H37O3P2Br has been determined by single crystal X-ray diffraction. The title compound is monoclinic, space group P2(1)/n (Nr. 14), with unit cell parameters a = 11.220(6), b = 14.345(10), c = ...
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Araya Maturana, Ramiro; Delgado Castro, Tomás; Gárate, M.; Ferreira Parker, Jorge; Pavani, M.; Pessoa Mahana, Hernán; Cassels Niven, Bruce (PERGAMON-ELSEVIER SCIENCE LTD, 2002-09)A set of structurally related compounds incorporating a carbonyl group in the ortho position with regard to a phenol function were tested against the TA3 mouse carcinoma cell line and its multidrug-resistant variant ...
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Araya Maturana, Ramiro; Delgado Castro, Tomás; Gárate, Mario; Ferreira Parker, Jorge; Pavani, Mario; Pessoa Mahana, Hernán; Cassels Niven, Bruce (Elsevier Science Ltd., 2002-01-29)Abstract—A set of structurally related compounds incorporating a carbonyl group in the ortho position withregard to a phenol function were tested against the TA3 mouse carcinoma cell line and its multidrug-resistant variant ...
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Araya Maturana, Ramiro; Cardona, Wilson; Cassels Niven, Bruce; Delgado Castro, Tomás; Ferrada Parker, Jorge; Miranda, Dante; Pavani, Mario; Pessoa Mahana, Hernán; Soto Delgado, Jorge; Weiss López, Boris (Elsevier Ltd., 2006-02-28)A series of tricyclic hydroquinones, incorporating a carbonyl group in the ortho position relative to the phenol function, were tested as inhibitors of oxygen uptake against the TA3 mouse carcinoma cell line and its ...
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Araya Maturana, Ramiro; Cardona, Wilson; Cassels Niven, Bruce; Delgado Castro, Tomás; Ferrada Parker, Jorge; Miranda, Dante; Pavani, Mario; Pessoa Mahana, Hernán; Soto Delgado, Jorge; Weiss López, Boris (Elsevier Ltd., 2006-02-28)Abstract—A series of tricyclic hydroquinones, incorporating a carbonyl group in the ortho position relative to the phenol function, were tested as inhibitors of oxygen uptake against the TA3 mouse carcinoma cell line and ...
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Olea Azar, Claudio; Mendizábal Emaldía, Fernando; Alarcón, Jaime; Briones, Rodolfo; Cassels Niven, Bruce; Delgado Castro, Tomás; Araya Maturana, Ramiro (PERGAMON-ELSEVIER SCIENCE LTD, 2001-08)The ESR spectra of radicals obtained by electrolytic reduction of 4,4-dimethylanthracene- 1,9,10 (4H)-trione (1) and the regioisomeric quinones 8-acetyloxymethyl-4,4,5-trimethyl- (2), and 5-acetyloxy-methyl-4,4,8-trimeth ...
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Mendoza, Leonora; Araya Maturana, Ramiro; Cardona, Wilson; Delgado Castro, Tomás; García, C.; Lagos, C.; Cotoras, M. (AMER CHEMICAL SOC, 2005-12-28)The effect on mycelial growth of the fungus Botrytis cinerea of a set of structurally related tricyclic hydroquinones [9,10-dihydroxy-4,4-dimethyl-2,3,5,8-tetrahydroantracen-1(4H)-one and 9,10-dihydroxy-4,4-dimethyl-5,8- ...
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Araya Maturana, Ramiro; Cassels Niven, Bruce; Delgado Castro, Tomás; Valderrama, Jaime A.; Weiss López, Boris (Elsevier Ltd, 1999)The Diels-Alder reactions of 8,8-dimethylnaphtalene-1,4,5(8H)-trione with 2,4-hexadien-1-ol and its O-acetyl derivative were investigated in different solvents. The regiochemistry of the cycloaddition of the hexadienol was ...
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Araya Maturana, Ramiro; Cassels Niven, Bruce; Delgado Castro, Tomás; Valderrama Guerrero, Jaime Adolfo; Weiss López, Boris (PERGAMON-ELSEVIER SCIENCE LTD, 1999-01-15)The Diels-Alder reactions of 8,8-dimethylnaphtalene-1,4,5(8H)-trione with 2,4-hexadien-1-ol and its O-acetyl derivative were investigated in different solvents. The regiochemistry of the cycloaddition of the hexadienol was ...
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Almodovar, Iriux; Cardona, Wilson; Delgado Castro, Tomás; Zapata Torres, Gerald; Caroli Rezende, Marcos; Araya Maturana, Ramiro; Maestro, M. Carmen; García Ruano, José L. (2013)Diels-Alder cycloaddition of 8,8-dimethylnaphthalene-1,4,5(8H)-trione with diastereomeric hydroxysulfinyldienes proceeded with high yields and good π-facial and regioselectivities. The hydroxysulfoxide moiety controls the ...
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Almodovar, Iriux; Cardona, Wilson; Delgado Castro, Tomás; Zapata Torres, Gerald Amilcar; Caroli Rezende, Marcos; Araya Maturana, Ramiro; Maestro, M. Carmen; García Ruano, José L. (Elsevier, 2013)Diels–Alder cycloaddition of 8,8-dimethylnaphthalene-1,4,5(8H)-trione with diastereomeric hydroxysulfinyldienes proceeded with high yields and good p-facial and regioselectivities. The hydroxysulfoxide moiety controls ...
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Araya Maturana, Ramiro; Delgado Castro, Tomás; Cardona, Wilson; Weiss López, Boris (BENTHAM SCIENCE PUBL LTD, 2001-03)The structural elucidation of complex organic molecules relies heavily on the application of proton detected heteronuclear NMR. Among these techniques, the HMBC NMR experiment is probably the most useful 2D NMR method The ...
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Araya Maturana, Ramiro; Delgado Castro, Tomás; Cardona,; Weiss López, Boris (2001)The structural elucidation of complex organic molecules relies heavily on the application of proton detected heteronuclear NMR. Among these techniques, the HMBC NMR experiment is probably the most useful 2D NMR method. The ...