62677-71-8Relevant academic research and scientific papers
Cobalt-Catalyzed Diastereo- And Enantioselective Reductive Allyl Additions to Aldehydes with Allylic Alcohol Derivatives via Allyl Radical Intermediates
Wang, Lei,Wang, Lifan,Li, Mingxia,Chong, Qinglei,Meng, Fanke
supporting information, p. 12755 - 12765 (2021/08/30)
Catalytic generation of ambiphilic π-allyl-metal complexes and their utility in enantioselective transformations constitutes a powerful approach for introduction of allyl groups to a molecule. Herein an unprecedented cobalt-catalyzed highly site-, diastereo-, and enantioselective protocol for stereoselective formation of nucleophilic allyl-Co(II) complexes followed by addition to aldehydes is presented. The reaction features diastereo- and enantioconvergent conversion of easily accessible allylic alcohol derivatives to diversified enantioenriched homoallylic alcohols with a remarkably broad scope of allyl groups that can be introduced. Mechanistic studies indicated that allyl radical intermediates were involved in this process. These new discoveries establish a new strategy for development of enantioselective transformations through capture of radicals by chiral Co complexes, pushing forward the frontier of Co complexes for enantioselective catalysis.
PLANT GROWTH REGULATOR COMPOUNDS
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Page/Page column 29; 30, (2018/04/13)
The present invention relates to relates to novel strigolactone derivatives of formula (I), to processes for preparing these derivatives including intermediate compounds, to seeds comprising these derivatives, to plant growth regulator or seed germination promoting compositions comprising these derivatives and to methods of using these derivatives in controlling the growth of plants and/or promoting the germination of seeds.
Synthesis of quaternary carbon stereocenters by copper-catalyzed asymmetric allylic substitution of allyl phosphates with arylboronates
Takeda, Momotaro,Takatsu, Keishi,Shintani, Ryo,Hayashi, Tamio
, p. 2354 - 2367 (2014/04/17)
A copper-catalyzed asymmetric allylic substitution of γ,γ- disubstituted allyl phosphates with arylboronates has been developed for the construction of quaternary stereocenters. High regio- and enantioselectivities have been achieved by employing a hydroxy-bearing chiral N-heterocyclic carbene ligand, and both E and Z substrates provide the same enantiomer as the major product. The mechanistic aspect of this catalysis has also been investigated to find that a 1:1 copper/ligand complex is most likely responsible for the present asymmetric catalysis, and the reaction proceeds with almost perfect 1,3-anti stereochemistry with respect to the allylic electrophile.
Superacid-promoted dual C-C bond formation by Friedel-Crafts alkylation and acylation of ethyl cinnamates: Synthesis of indanones
Venkat Ramulu, Bokka,Gopi Krishna Reddy, Alavala,Satyanarayana, Gedu
, p. 868 - 872 (2013/05/22)
A superacid (triflic acid) promoted dual C-C bond formation via intermolecular Friedel-Crafts alkylation (Michael addition type) and intramolecular acylation for the efficient synthesis of 3-substituted indan-1-ones is presented. This method was successful in activating ethyl cinnamates towards dual aromatic electrophilic substitution. Moreover, it enabled us to synthesize novel spirotetracyclic systems. Georg Thieme Verlag Stuttgart · New York.
BICYCLIC INDOLINE SULFONAMIDE DERIVATIVES
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Page/Page column 24; 25, (2010/02/10)
The invention relates to novel bicyclic indoline sulfonamide derivatives of general formula (I), methods for the production thereof, and the use thereof in medicaments, especially as potent PPAR delta agonists for preventing and/or treating cardiovascular
