Chemical reactions databases CrossFire Beilstein

This description sees the elements of the database as structures linked to properties linked to references, and a chemical reactions database is included . This reflects exactly the historical development of the Beilstein Handbook, and later the Beilstein file on STN and DIALOG these collections are lists of compounds, with subsections on property type, linked to sub-subsections of reference lists. But the CrossFire implementation is much more than this. It has a different data orientation, and can justly be regarded as a new implementation, in fact a... 

The CrossFire Beilstein database is the world s largest compilation of chemical facts. This database indexes three primary data domains substances, reactions and literature. The substance domain stores structural information with aU associated facts and literature references, including chemical, physical and bioactivity data. The reaction domain details the preparation of substances, enabling scientists to investigate specific reaction pathways with reaction search queries. The literature domain includes citations, titles and abstracts, which are hyperhnked to the substance and reaction domain entries. It contains over 320 million experimental data, over 10 million reactions and data indexed from over 175 journals. 

Beilstein Handbook of Organic Chemistry - The classic source of data on organic compounds, dating from the 18 century, Beilstein was converted to electronic form in the last decade of the 20" century. Over 8 million compounds and 5 million chemical reactions are now covered, with a broad range of physical properties as well as synthetic methods and ecolr cal data. The database is accessed by the CrossFire software... 

Beilstein database The database covers the scientific literature from 1771 to the present and contains experimentally validated information on millions of chemical reactions and substances from original scientific publications. The electronic database was based on Beilstein s Handbook of Organic Chemistiy. In this database, each compound is given a unique Beilstein Registiy Number which helps in their easy identification. Each substance has up to 350 fields containing chemical and physical data. References to the literature in which the reaction or substance data appears are also given. The content is made available through the CrossFire Beilstein database. 

As quite a number of reactions are, like other chemical information, first, or only, published in patents, these are an important source of reaction information, even though one would normally assume that new synthetic methods would also be published in the journal literature. Since 1991, reactions taken from patents have been included in CASREACT patents comprise less than 10% of the CASREACT database in 1997, compared to about 16% of the CA database. CrossFire plus Reactions contains many reactions from patents registered before 1980, when Beilstein ceased to index patents. About 14% of the reactions in CRDS/JSM and 10% of those in ChemReact originate from patents CCR includes only US patents, which contribute about 10% of the reactions and Cheminform covers no patents at all. 

For a detailed comparison of CrossFire plus Reactions with other reaction databases, see E. Zass, in The Beilstein System , ed. S. R. Heller, American Chemical Society, Washington, DC, 1998, pp. 99-131. 

CrossFire Abstracts is a companion to the highly popular in-house database management system Cross-Fir .-/.< jReactions. It provides immediate access to the whole Beilstein knowledge base, with 7 million compounds, 10 million reactions, 20 million factual data, and 50 million hyperlinks, and also to titles and abstracts from the organic chemical literature from 1980 to the present. (See CrossFire Abstracts Titles and Abstracts from the Organic Chemical Literature.)... 

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