Showing papers by "Dong Wang published in 2007"
TL;DR: An efficient method for highly alpha-regioselective nucleophilic substitution of the Baylis-Hillman acetates with indoles catalyzed by AgOTf in high yields (72-99%) has been developed.
53 citations
TL;DR: The biotransformation of gentiopicroside by asexual mycelia of Cordyceps sinensis yielded two products, one of which was proved to be a new pyridine monoterpene alkaloid.
24 citations
TL;DR: The Friedel-Crafts alkylation of indoles with nitroacrylates could provide α- and β-tryptophan nitro-precursors, respectively, in moderate to good yields under Lewis acid catalysis.
Abstract: The Friedel-Crafts alkylation of indoles with nitroacrylates could provide α- and β-tryptophan nitro-precursors, respectively, in moderate to good yields under Lewis acid catalysis. The diastereoselectivities of the reaction were enhanced by using 2-substituted indoles. The alkylation products could be easily transformed to nonnatural tryptophan derivatives.
6 citations
TL;DR: Metal-oxide-semiconductor structures with NiSi2 and CoSi2 nanocrystals embedded in the SiO2 layer have been fabricated and a pronounced capacitance-voltage hysteresis was observed with a memory window about 1 V under low programming voltage.
Abstract: Metal-oxide-semiconductor structures with NiSi2 and CoSi2 nanocrystals embedded in the SiO2 layer have been fabricated. A pronounced capacitance-voltage hysteresis was observed with a memory window about 1 V under low programming voltage. The retention characteristic can be improved by using HfO2 layer as control oxide. The processing of the structure is compatible with the current manufacturing technology of semiconductor industry.
3 citations
2 citations