In reality, different persons often have the same person name. The Person Cross Document Co-reference Resolution is a task, which requires that all and only the textual mentions of an entity of type Person be individuated in a collection of text documents. In this paper, we implement a Chinese Person Name Cross Document Co-reference Resolution System. First, we utilize name identification module to recognize all person names of the texts, and then classify the document collection of same person name by rules preliminarily, and at last, we compute similarities of each classification based on VSM, according to the prior similarities, the system get the final classification results. We test the system on 30 usual Chinese names of the corpus provided by CLP, and average F measure is 85.9%.

Supported gold nanoparticles (NPs), which are well-known epoxidation catalysts, were found to be exceptionally active for the selective deoxygenation of epoxides into alkenes using cheap and easily accessible CO and H(2)O as the reductant.

AbstractA wide range of aromatic and aliphatic tertiary amines is prepared using Au‐TiO2 with very small particles.

The use of supported gold nanoparticles as an efficient, green and reusable catalyst for the oxidation of various alcohols to the corresponding carbonyl compounds using aqueous hydrogen peroxide as an environmentally benign oxidant is presented. The reaction proceeds with good to excellent yields in particular for nonactivated alcohols under base-free conditions.

Reduction of aldehydes to the corresponding alcohols is one of the most fundamental and useful reactions that are important in the pharmaceutical and chemical industry. Among the various available reduction protocols for the synthesis of valuable hydroxy compounds, catalytic transfer hydrogenation (TH) has emerged as the most viable, mainly due to the non-involvement of highly flammable and explosive molecular hydrogen or highly expensive metal hydride donors. Moreover, TH processes generally involve easy handling and recovery of products, recycling of catalyst and minimization of undesired toxic wastes. One of the recent highlights in this field is the use of cheap and easily accessible formic acid or its salts as possible in situ hydrogen sources, which has attracted special attention owing to their ease of hydrogen donation as compared to most other transfer reduction agents. In this context, TH of aldehydes in the presence of formate salts is an area of growing interest. Although many transition-metal-based TH catalysts have been developed, c] the focus has been largely on homogeneous rather than heterogeneous catalysis. To the best of our knowledge, few heterogeneous catalysts have been reported that enable fast, chemoselective, and productive TH of aldehydes with inexpensive, eco-friendly formates, and that can tolerate the presence of synthetically useful functional groups. Supported gold nanoclusters have attracted increased interest in the past few years as new generation of advanced catalysts for a number of organic transformations including chemoselective reduction of unsaturated carbonyl or nitro compounds by molecular hydrogen. One critical limitation associated with the present Au-catalyzed hydrogenation process, however, is the unfavorably low hydrogen-delivery rates compared to other noble metals. Very recently, we have described the use of a facile gold-catalyzed, 2-propanol-mediated TH strategy that bypasses the inconvenient H2 activation thus enabling fast and chemoselective reduction of a range of aromatic ketone and nitro groups. From an environmental and an economic viewpoint, efficient functional transformations under milder conditions would be most desirable. Herein, we report a highly efficient, aqueous, room temperature, formate-mediated TH of aldehydes catalyzed by supported gold nanoclusters. Our results have shown that the reaction is general and can proceed at temperatures as low as 25 8C. Moreover, an inert atmosphere is not required. Initially, various heterogeneous catalysts were applied to the transformation of benzaldehyde to benzyl alcohol in aqueous HCOOK without inert gas protection at 80 8C (Table 1). The benefit of using redox CeO2 as a support,

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Two birds with one auric stone: The title system acts as a highly efficient heterogeneous catalyst for the one-pot tandem synthesis of imines or oximes from alcohols and the corresponding amines under mild conditions (see scheme; HAP = hydroxyapatite).

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Decatungstate W(10)O(32)(4-) heterogenized on a novel hydrophobically-organomodified SBA-15 was proven an efficient, green and reusable catalyst for photooxygenation by oxygen of a range of aryl alkanes to the corresponding ketones under mild conditions.

One great challenge for the current sustainable chemistry is the development of new green catalytic technologies that can afford resource-saving, environmentally benign, mild and atom-economic synthesis of fine chemicals. The latest progress in the use of supported gold nanoparticles or as new efficient catalysts for selective oxidation, chemo-selective reduction, "one-step" or "one-pot" tandem reactions, and the biomass utilization has been reviewed. Factors affecting the catalytic performance of gold nanocatalysts as well as the prospects for green gold catalysis were also presented.

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

A new heterogeneous catalytic transfer hydrogenation (CTH) system, consisting of a non-flammable supported Au catalyst along with 2-propanol as the hydrogen donor, was proven to be effective for chemoselective reduction of a wide range of aromatic ketones and aldehydes to the corresponding alcohols.

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.