A new, high yielding method for the preparation of vasicinone (7) is described. Reaction of 2-nitrobenzoic acid with N, N¢-carbonyldiimidazole followed by 2-pyrrolidinone gave 1-(2-nitrobenzoyl)pyrrolidine-2-one (3). Reduction of the latter with 10% Pd-C afforded deoxyvasicinone (4). Reaction of deoxyvasicinone (4) with bromine yielded monobromo-deoxyvasicinone (5). Exchange of bro...

Cu-exchanged SSZ-16 zeolite catalysts exhibit outstanding NH3-SCR activity, but their catalytic performance after hydrothermal treatments is not ideal. In order to improve the stability of Cu-SSZ-16, CuCex-SSZ-16 series were prepared via an ion exchange process, and effect Ce modification on was investigated. addition, increasing contents significantly improved stability, CuCe0.87-SSZ-16 showed...

Previous research has found that iconic gestures (i.e., gestures that depict the actions, motions or shapes of entities) identify referents that are also lexically specified in the co-occurring speech produced by proficient speakers. This study examines whether concrete deictic gestures (i.e., gestures that point to physical entities) bear a different kind of relation to speech, and whether thi...

We report on a first-principles study of the troilite phase of iron sulfide (FeS). We show that even if, a few decades ago, this material was thought to be ferroelectric, the structural transition from the high P6_{3}/mmc to the low P6[over ¯]2c symmetry phase does not involve polar instabilities, though the space inversion center symmetry is broken. Our calculations and symmetry analysis never...

1 [Ano98s, BH15, Bre10, PFC02a, Ste02a, Ste14a]. 1-GHz [Ano98s]. 1-terabits [MIM97]. 10 [Loc03]. 10-Gigabit [Gad07, HcF04]. 100 [Kir84a, Pat84, PSW91, ZACM14]. 100-Mops [PSW91]. 1000 [ES84]. 11[Lyl04]. 11/780 [Abr83]. 115 [JBF94]. 11FO4 [ASD05]. 12 [DTB01, Dur96, SS05]. 12-DSP [Dur96]. 1284 [Dia94b]. 1284-1994 [Dia94b]. 13 [KW02]. 1394 [SB00]. 1394-1955 [Dia96d]. 14 [WD03]. 15 [FD04]. 15-Billio...