76489-56-0Relevant academic research and scientific papers
Chiral Boron Complex-Promoted Asymmetric Diels-Alder Cycloaddition and Its Application in Natural Product Synthesis
Li, Xia,Han, Jianguang,Jones, Alexander X.,Lei, Xiaoguang
, p. 458 - 468 (2016)
An efficient method for the asymmetric Diels-Alder cycloaddition of 2'-hydroxychalcones with acyclic or cyclic dienes has been successfully developed. The Diels-Alder cycloaddition is mediated by a chiral boron complex with VANOL, affording the corresponding products in high yields and with excellent diastereo- and enantioselectivities. This reaction enabled the enantioselective construction of cyclohexene skeletons crucial for the total synthesis of a number of Diels-Alder-type natural products (-)-nicolaioidesin C, (-)-panduratine A, (-)-kuwanon I, (+)-kuwanon J, and (-)-brosimones A and B.
CHALCOMORACIN, A NATURAL DIELS-ALDER ADDUCT FROM DISEASED MULBERRY
Takasugi, Mitsuo,Nagao, Shigemitsu,Masamune, Tadashi,Shirata, Akira,Takahashi, Kokichi
, p. 1573 - 1576 (2007/10/02)
The structure elucidation of a new phytoalexin, isolated from diseased mulberry leaves and designated as chalcomoracin, is described.The compound is regarded biogenetically as a Diels-Alder adduct of a chalcone, isolated newly from diseased mulberry shoot
ALBANINS F AND G, NATURAL DIELS-ALDER ADDUCTS FROM MULBERRY
Takasugi, Mitsuo,Ishikawa, Shin-ichi,Nagao, Shigemitsu,Masamune, Tadashi,Shirata, Akira,Takahashi, Kokichi
, p. 1577 - 1580 (2007/10/02)
The structure elucidation of albanins F and G, two of the preexisting antifungal principles of shoot epidermis of mulberry, is described.
