13321-74-9Relevant articles and documents
Synthesis and antitumor activity evaluation of compounds based on toluquinol
Cheng-Sánchez, Iván,Torres-Vargas, José A.,Martínez-Poveda, Beatriz,Guerrero-Vásquez, Guillermo A.,Medina, Miguel ángel,Sarabia, Francisco,Quesada, Ana R.
, (2019/09/03)
Encouraged by the promising antitumoral, antiangiogenic, and antilymphangiogenic properties of toluquinol, a set of analogues of this natural product of marine origin was synthesized to explore and evaluate the effects of structural modifications on their cytotoxic activity. We decided to investigate the effects of the substitution of the methyl group by other groups, the introduction of a second substituent, the relative position of the substituents, and the oxidation state. A set of analogues of 2-substituted, 2,3-disubstituted, and 2,6-disubstituted derived from hydroquinone were synthesized. The results revealed that the cytotoxic activity of this family of compounds could rely on the hydroquinone/benzoquinone part of the molecule, whereas the substituents might modulate the interaction of the molecule with their targets, changing either its activity or its selectivity. The methyl group is relevant for the cytotoxicity of toluquinol, since its replacement by other groups resulted in a significant loss of activity, and in general the introduction of a second substituent, preferentially in the para position with respect to the methyl group, was well tolerated. These findings provide guidance for the design of new toluquinol analogues with potentially better pharmacological properties.
Approach to Merosesquiterpenes via Lewis Acid Catalyzed Nazarov-Type Cyclization: Total Synthesis of Akaol A
Kakde, Badrinath N.,Kumar, Nivesh,Mondal, Pradip Kumar,Bisai, Alakesh
, p. 1752 - 1755 (2016/05/19)
A Lewis acid catalyzed Nazarov-type cyclization of arylvinylcarbinol has been developed for the asymmetric synthesis of carbotetracyclic core of merosesquiterpenes. The reaction works only in the presence of 2 mol % of Sn(OTf)2 and Bi(OTf)3 in dichloroethane under elevated temperature. The methodology offers the synthesis of a variety of enantioenriched arylvinylcarbinols from commercially available (3aR)-sclareolide 9 in six steps with an eventual concise total synthesis of marine sesquiterpene quinol, akaol A (1a).
Synthesis of murrayaquinone A and analogues via ring-closing C-H arylation
Bedford, Robin B.,Bowen, John G.,Weeks, Amanda L.
, p. 4389 - 4394 (2013/06/26)
A compact synthesis of Murrayaquinone A is reported, based on sequential Buchwald-Hartwig amination/annulative C-H activation followed by oxidation of the intermediate carbazole. The methodology can be readily extended to other analogues with electron-rich quinone rings.
Synthesis and biological evaluation of 1,4-naphthoquinones and quinoline-5,8-diones as antimalarial and schistosomicidal agents
Lanfranchi, Don Antoine,Cesar-Rodo, Elena,Bertrand, Beno?t,Huang, Hsin-Hung,Day, Latasha,Johann, Laure,Elhabiri, Mourad,Becker, Katja,Williams, David L.,Davioud-Charvet, Elisabeth
scheme or table, p. 6375 - 6387 (2012/09/05)
Improving the solubility of polysubstituted 1,4-naphthoquinone derivatives was achieved by introducing nitrogen in two different positions of the naphthoquinone core, at C-5 and at C-8 of menadione through a two-step, straightforward synthesis based on the regioselective hetero-Diels-Alder reaction. The antimalarial and the antischistosomal activities of these polysubstituted aza-1,4-naphthoquinone derivatives were evaluated and led to the selection of distinct compounds for antimalarial versus antischistosomal action. The AgII-assisted oxidative radical decarboxylation of the phenyl acetic acids using AgNO3 and ammonium peroxodisulfate was modified to generate the 3-picolinyl-menadione with improved pharmacokinetic parameters, high antimalarial effects and capacity to inhibit the formation of β-hematin. The Royal Society of Chemistry 2012.
A short synthesis of bisabolane sesquiterpenes
Du, Zhen-Ting,Zheng, Shuai,Chen, Gang,Lv, Dong
scheme or table, p. 8053 - 8061 (2011/11/05)
A facile total synthesis of three members of the bisabolane sesquiterpene family, namely (±)-curcumene, (±)-xanthorrhizol and (±)-curcuhydroquinone had been achieved in high overall yield. The synthesis used bromobenzene derivatives as starting materials.
Total syntheses of enokipodins A and B utilizing palladium-catalyzed addition of an arylboronic acid to an allene
Yoshida, Masahiro,Shoji, Yasunobu,Shishido, Kozo
supporting information; experimental part, p. 1441 - 1443 (2009/10/02)
The enantioselective total syntheses of enokipodins A and B, α-cuparenone-type sesquiterpenoids with antimicrobial activity, have been achieved. The key step is the enantiospecific construction of the quaternary carbon center using a palladium-catalyzed a
Factors influencing prenylation of an aromatic organolithium
Klein, Rosalyn,Sunassee, Suthananda N.,Davies-Coleman, Michael T.
experimental part, p. 468 - 472 (2010/02/28)
An apparently routine metal-halogen exchange (MHE) reaction gave variable low yields under typical conditions. 13C and 7Li NMR studies suggested a diversity of organolithiums were formed in the MHE reaction leading to a plethora of p
Synthesis of triprenylated toluquinone and toluhydroquinone metabolites from a marine-derived Penicillium fungus
Scheepers, Brent A.,Klein, Rosalyn,Davies-Coleman, Michael T.
, p. 8243 - 8246 (2007/10/03)
Two triprenylated toluquinone and toluhydroquinone marine fungal metabolites, 5-methyl-2-[(2′E,6′E)-3′,7′,11′-trimethyl-2′,6′,10′-dodecatrienyl]-2,5-cyclohexadiene-1,4-dione and 5-methyl-2-[(2′E,6′E)-3,7,11-trimethyl-2′,6′,10′-dodecatrienyl]-1,4-benzenediol, were synthesized in four and five steps, respectively, from 2-methyl-1,4-benzoquinone. The synthesis extends the applicability of the oxidative ether cleavage of hydroquinone dimethyl ethers with argentic oxide under acidic conditions to include the oxidative demethylation of polyprenylated-1,4-dimethoxy-toluhydroquinones with a quantitative survival of the oxidation- and acid-sensitive polyprenyl side chain.
Synthesis of hipposudoric and norhipposudoric acids: The pigments responsible for the color reaction of the red sweat of Hippopotamus amphibius
Saikawa, Yoko,Moriya, Kai,Hashimoto, Kimiko,Nakata, Masaya
, p. 2535 - 2538 (2007/10/03)
Highly unstable pigments, hipposudoric acid and norhipposudoric acid, isolated from the red sweat of hippopotamus were synthesized using the Pschorr reaction for the construction of the fluorene nucleus as the key step and the careful oxidation in the las
Stereospecific synthesis of amphetamines
Wagner, Jared M.,McElhinny Jr., Charles J.,Lewin, Anita H.,Carroll, F. Ivy
, p. 2119 - 2125 (2007/10/03)
Regioselective addition of aryl lithium to commercially available (S)-(+)-propylene oxide provides the corresponding (S)-aryl-2-propanol. The (R)-amphetamine is obtained by conversion of the alcohol to the tosylate followed by azide displacement and hydrogenation. Mitsunobu conversion of the alcohol to the (R)-bromide followed by azide displacement and hydrogenation affords the (S)-amphetamine.