426835-33-8Relevant academic research and scientific papers
Stereoselective construction of novel biaryl bridged seven-membered ring scaffolds via intramolecular [3 + 2] cycloaddition reactions
Butt, Hafiza Marium,Wei, Shiqiang,Wang, Yue,Qu, Jingping,Wang, Baomin
supporting information, (2021/11/24)
A novel approach to biaryl bridged seven-membered carbocyclic scaffolds was developed by means of an intramolecular [3 + 2] cycloaddition process of in situ formed azomethine ylides from 2-cinnamoyl-2'-formyl biphenyl and diethyl aminomalonate hydrochlori
Beyond the Corey–Chaykovsky Reaction: Synthesis of Unusual Cyclopropanoids via Desymmetrization and Thereof
Patel, Kaushalendra,Mishra, Uttam K.,Mukhopadhyay, Dipto,Ramasastry
supporting information, p. 4568 - 4571 (2019/11/03)
Desymmetrization-based protocols for the synthesis of highly functionalized indeno-spirocyclopropanes and cyclopropa-fused indanes have been established through unexpected reactions triggered by the Corey–Chaykovsky reagent. These structures were further elaborated in one step to privileged scaffolds such as fluorenones, indenones, and naphthaphenones. For instance, an acid-catalyzed transformation of indeno-spirocyclopropanes provided fluorenones via a homo-Nazarov-type cyclization, and naphthaphenones were obtained via an acid-catalyzed cyclopropane ring-opening/retro-Michael sequence.
Synthesis of substituted indenones and indanones by a Suzuki-Miyaura coupling/acid-promoted cyclisation sequence
Butkevich, Alexey N.,Ranieri, Beatrice,Meerpoel, Lieven,Stansfield, Ian,Angibaud, Patrick,Corbu, Andrei,Cossy, Janine
supporting information, p. 728 - 731 (2014/01/23)
A one-pot Suzuki-Miyaura cross-coupling/acid-catalyzed cyclisation leading to indenones and indanones in modest to good yields is reported.
Enantioselective synthesis of chiral 3-aryl-1-indanones through rhodium-catalyzed asymmetric intramolecular 1,4-addition
Yu, Yue-Na,Xu, Ming-Hua
, p. 2736 - 2741 (2013/05/21)
Enantioselective synthesis of potentially useful chiral 3-aryl-1-indanones was achieved through a rhodium-catalyzed asymmetric intramolecular 1,4-addition of pinacolborane chalcone derivatives using extraordinary simple MonoPhos as chiral ligand under rel
COMPOSITION FOR TREATING DIABETES AND METABOLIC DISEASES AND A PREPARATION METHOD THEREOF
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Paragraph 0029, (2013/03/26)
Disclosed is a chalcone composition for treating diabetes and metabolic syndromes. In particular, the chalcone compound bound with 2-halogen in ring A significantly decreases the blood glucose level in the in vitro anti-diabetic effect experiment. In the in vivo animal model, the leading chalcone compound can prevent the progression of diabetes and control the blood glucose level, and there is no significant difference in the gains in body weight. Throughout the seven-week administration, there are no hepatic or renal toxicity observed.
Cascade radical synthesis of heteroarenes via iminyl radicals
Bowman,Bridge,Brookes,Cloonan,Leach
, p. 58 - 68 (2007/10/03)
A novel cascade cyclisation protocol has been developed which 'zips up' two rings to form new tetracycles. In the protocol, treatment of vinyl bromides and iodides with hexamethylditin (Me3Sn· yields intermediate vinyl radicals which undergo 5-exo cyclisation onto nitrile groups to yield intermediate iminyl radicals. The iminyl radicals can undergo 6-endo cyclisation (or 5-exo followed by neophyl rearrangement) to yield tetracyclic π-radicals which lose hydrogen (H·) in an H-abstraction step. Methyl radicals, generated from the breakdown of trimethylstannyl radicals (Me3Sn·), are proposed as a possible H-abstractor for this final oxidative step. The protocol has been used to synthesise the tetracyclic rings A-D (tetracycle indolizino[1,2-b]quinolin-9(11H)-one) of the anticancer alkaloids camptothecin, mappicine, nothapodytine B and nothapodytine A. The protocol has also been applied to the synthesis of analogues of camptothecin in which ring A has been replaced by thiophene (8,10-dihydrothieno[2′,3′:5,6]pyrido[2,3-a]indolizin-8-one) and ring D by pyrrole (10H-pyrrolizino[1,2-b]quinoline) and benzene (11H-indeno[1,2-b]quinolin-11-one).
