2688-48-4Relevant academic research and scientific papers
Total synthesis of clavatadine A
Conn, Stephanie J.,Vreeland, Shannon M.,Wexler, Alexandra N.,Pouwer, Rebecca N.,Quinn, Ronald J.,Chamberland, Stephen
, p. 120 - 124 (2015)
The first total synthesis of the potent and selective human blood coagulation factor XIa inhibitor clavatadine A (1) is described. Direct, early-stage guanidinylation enabled rapid, convergent access to an immediate clavatadine A precursor. Concomitant lactone hydrolysis and guanidine deprotection with aqueous acid cleanly provided clavatadine A (1) in only four steps (longest linear sequence, 41-43% overall yield).
Lewis acid promoted synthesis of 2(3H)-benzofuranones
Babu, B. Ravindra,Bali, Shilpika,Sakhuja, Rajeev,Jain, Subhash C.
, p. 2546 - 2548 (2007/10/03)
A Lewis acid promoted one-step synthesis of 2(3H)-benzofuranones via an intramolecular rearrangement of the corresponding substituted O-methoxyacetylbenzenes and coumarins is described.
Isoaurones: synthesis and stereochemical assignments of geometrical isomers
Venkateswarlu, Somepalli,Panchagnula, Gopala K.,Guraiah, Mothukuri Bala,Subbaraju, Gottumukkala V.
, p. 9855 - 9860 (2007/10/03)
A series of isoaurones have been synthesized for the first time from substituted acetophenones via benzo-2(3H)-furanone in three steps. Geometrical isomers of the isoaurones were separated. The differences in the proton and carbon NMR spectra of the E- and Z-isoaurones afford a useful method for distinguishing between the two isomers. Marginalin, a metabolite of Dytiscus marginalis has been synthesized and the spectral data of the synthetic E-isomer were in good agreement with those of the natural product. The antioxidant activity of isoaurones was determined by superoxide free radical (NBT) method and isoaurones 12 and 13 displayed excellent antioxidant activity.
Synthesis of 5-hydroxyoxaindan-2-ones and indol-5-ols from 1,4- cyclohexanedione
Ozaki, Yutaka,Quan, Zhe-Shan,Watabe, Kyouko,Kim, Sang-Won
, p. 727 - 731 (2007/10/03)
1,4-Cyclohexanedione reacted with 2-oxocarboxylic acids to give 5- hydroxyoxaindan-2-ones including homogentisic lactone in one pot. The obtained aromatic compounds were transformed into indol-5-ols in a few steps. The sequential reactions showed a significance of 1,4-cyclohexanedione as a starting material in aromatic synthesis and an alternative access to the indol-5-ols.
Ketene S,N-Acetals as Synthetic Intermediates for Heterocycles. Reaction of Ketene S,N-Acetals with 1,4-Quinones
Takahata, Hiroki,Anazawa, Akira,Moriyama, Keiko,Yamazaki, Takao
, p. 1501 - 1504 (2007/10/02)
Annelation of ketene S,N-acetals with 1,4-quinones is found to give benzo- and naphthofurans bearing enamine groups.Subsequent enamine reaction allows the formation of 1-benz- and naphthooxepines and benzofuran-2-ones.
