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The wider-gap members of a semiconductor series such as diamond→Si→Ge or AlN→GaN→InN often cannot be doped n-type at equilibrium. We study theoretically if this is the case in the chalcopyrite family… (More)
- Yujun Zhao, Teck-Peng Loh
- Chemical communications
- 2008
This communication describes a highly efficient intermolecular polyene cyclization method using steroidal acetals as the initiators to synthesize tetracyclic terpenoids; both good yields and good… (More)
- Yujun Zhao, Teck-Peng Loh
- Organic letters
- 2008
The first asymmetric total synthesis of antiochic acid using bioinspired polyene cyclization strategy is described. Both good yield and good asymmetric induction were obtained.
- Bin Li, Yujun Zhao, Yin-Chang Lai, Teck-Peng Loh
- Angewandte Chemie
- 2012
tropane alkaloids, and consequently there is an increasing interest in their potential pharmaceutical use, particularly against cocaine abuse. Compelled by the interesting biological activities of… (More)
- Jia He, Yujun Zhao, +7 authors Xinbin Ma
- Chemical communications
- 2017
A Fe-based catalyst exhibits extremely high selectivity (89.6%) besides excellent catalytic activity in gas-phase dimethyl oxalate hydrogenation. The ethanol formation occurs via hydrogenation of… (More)
- Jun-feng Zhao, Yujun Zhao, Teck-Peng Loh
- Chemical communications
- 2008
An arene-terminated epoxy olefin cyclization was promoted by a water-tolerant Lewis acid to give tri- and tetracyclic 3beta-hydroxy terpenoids and steroid derivatives in 57 and 37% yields,… (More)
- Yujun Zhao, Teck-Peng Loh
- Journal of the American Chemical Society
- 2008
New strategies using chiral acetal or chiral mixed-acetal in the presence of Lewis acids (SnCl4 or TiCl4) to promote polyene cyclization reaction are described. Acetal-promoted and… (More)
- Jinlong Gong, Hairong Yue, +5 authors Xinbin Ma
- Journal of the American Chemical Society
- 2012
This paper describes an emerging synthetic route for the production of ethanol (with a yield of ~83%) via syngas using Cu/SiO(2) catalysts. The remarkable stability and efficiency of the catalysts… (More)
- Yujun Zhao, Shu-Sin Chng, Teck-Peng Loh
- Journal of the American Chemical Society
- 2007
This paper describes a highly efficient intermolecular biomimetic polyene cyclization method using acetal as initiators. Both good yield and asymmetric induction were obtained.
- Yujun Zhao, Li-jun Tan, Bin Li, Si-min Li, Teck-Peng Loh
- Chemical communications
- 2009
This communication describes a highly efficient aziridinyl polyolefin cyclization catalyzed by InBr(3) to synthesize chiral terpenoid bearing a 3-amino group in the A ring; both good yields and… (More)