Zobrazeno 51 - 60
of 190
pro vyhledávání: '"Wei Wang"'
Publikováno v:
Organic Letters. 18:4376-4379
Three novel 7,8-seco-lycopodane-derived 8,5-lactones (annotinolides A-C, 1-3) were isolated from Lycopodium annotinum. Their structures were elucidated by spectroscopic methods and single-crystal X-ray diffraction. Compound 1 possesses an unusual cyc
Autor:
Guan-Hu Bao, Pu Wang, Xiaochun Wan, Zhengzhu Zhang, Biying Zhu, Wei Wang, Peng Zhang, Wei-Wei Deng, Tie-Jun Ling, Fei-Hua Wu, Chi-Tang Ho
Publikováno v:
Organic letters. 21(13)
Racemic trimethylallantoin monomer (1), mesomeric and racemic trimethylallantoin dimers (2 and 3), were isolated from tea. Two pairs of optically pure enantiomers (1a, 1b and 3a, 3b) were separated by chiral column from the two racemes (1 and 3). The
Publikováno v:
Organic letters. 21(9)
An approach for efficient synthesis of C-glycosyl amino acids is described. Different from typical photoredox-catalyzed reactions of imines, the new process follows a pathway in which α-imino esters serve as electrophiles in chemoselective addition
Autor:
Cheng Yao, Shen Zuyuan, Anqi Zhou, Wei Wang, Shilei Zhang, Huihui Geng, Xinyu Zhang, Jiarui Wang, Xiaobei Chen
Publikováno v:
Org Lett
A conceptually novel sulfoxonium metathesis reaction between TMSOI and cost-effective DMSO-d6 is developed for the efficient generation of a new trideuteromethylation reagent TDMSOI. The new reagent TDMSOI is produced highly efficiently by simply hea
Autor:
Haofeng, Zhou, Yindengzhi, Guoruoluo, Yali, Tuo, Junfei, Zhou, Hanqi, Zhang, Wei, Wang, Ming, Xiang, Haji Akber, Aisa, Guangmin, Yao
Publikováno v:
Organic letters. 21(2)
Two novel diterpenoids, cassiabudanols A (1) and B (2), were isolated from cassia buds. Their structures were determined by comprehensive spectroscopic analysis and single-crystal X-ray diffraction. Compounds 1 and 2 possess an unprecedented 11,14- c
Publikováno v:
Organic letters. 20(24)
A hypervalent iodine(III)-mediated intramolecular decarboxylative Heck-type reaction of 2-vinyl-phenyl oxamic acids has been developed. The unique ring-strain-enabled radical decarboxylation mechanism is preliminarily revealed. This protocol features
Autor:
Tianjiao Zhu, Dehai Li, Wei Wang, Qianqun Gu, Liang Qiao, Xiaoning Han, Qian Che, Yan-Kai Liu
Publikováno v:
Organic letters. 20(17)
Three new derivatives, anthranosides A–C (1–3), were discovered from a marine sponge-derived actinomycete Streptomyces sp. CMN-62. Their structures including absolute configurations were elucidated using MS and NMR spectroscopic data, X-ray singl
Publikováno v:
Organic Letters. 18:684-687
A novel and regioselective approach to carbonyl-containing alkyl chlorides via silver-catalyzed ring-opening chlorination of cycloalkanols is reported. Concurrent C(sp(3))-C(sp(3)) bond cleavage and C(sp(3))-Cl bond formation efficiently occur with g
Publikováno v:
Organic letters. 20(9)
Three new dimeric imidazole alkaloids with a methylene bridge, camellimidazole A–C (1–3), were isolated from Keemum black tea. Their structures were completely elucidated by a combination of diverse spectroscopic and single-crystal X-ray diffract
Publikováno v:
Organic letters. 20(5)
Herein, 2-vinylpyridines as a new type of electron-poor system for the asymmetric cross Rauhut–Currier reaction are reported. 2-Vinylpyridines are chemo- and enantioselectively activated by a newly designed chiral phosphine catalyst. The new reacti