853750-34-2Relevant academic research and scientific papers
Access to enantiopure 2,5-diaryltetrahydrofurans - Application to the synthesis of (-)-virgatusin and (+)-urinaligran
Martinet, Sophie,Meou, Alain,Brun, Pierre
experimental part, p. 2306 - 2311 (2009/08/17)
The diastereoselective Mnm-promoted radical addition of (3- oxoesters 1 onto N-cinnamoyloxazolidinones 2 afforded 2,3- dihydrofurans 3. After catalytic hydrogenation of the C=C bond, followed by reductive removal of the chiral auxiliary, the re
First enantioselective synthesis of (-)- And (+)-virgatusin, tetra-substituted tetrahydrofuran lignan
Yamauchi, Satoshi,Okazaki, Momotoshi,Akiyama, Koichi,Sugahara, Takuya,Kishida, Taro,Kashiwagi, Takehiro
, p. 1670 - 1675 (2007/10/03)
The first highly enantioselective syntheses of tetra-substituted tetrahydrofuran lignan, (-)- and (+)-virgatusin, were achieved. Hemiacetal 15 was stereoselectively obtained from Evans's syn-aldol product 8 as a single isomer. This hemiacetal 15 was converted to (-)-virgatusin via hydrogenolysis. (+)-Virgatusin was also synthesized through the same process. The enantiomeric excess of the both enantiomers was determined as more than 99% ee. The Royal Society of Chemistry 2005.
First total synthesis of tetrasubstituted tetrahydrofuran lignan, (-)- virgatusin
Yoda, Hidemi,Mizutani, Masato,Takabe, Kunihiko
, p. 4701 - 4702 (2007/10/03)
The first asymmetric total synthesis of (-)-virgatusin, a new furanolignan, isolated from phyllanthus virgatus, was accomplished in a stereoselective manner by nucleophilic addition of organolithium reagent to the functionalized lactone elaborated from di
