CASREACT Chemical Abstracts Service Reactions

CASREACT Chemical Abstracts Service chemical reactions biblio., reaction, struc- ture >400 000 documents >6.6 mio reactions journals, patents STN commercial CD-ROM, online weekly WUW.CflS.OTg... 

CASREACT (Chemical Abstracts Reaction Search Service) is a reaction database started in 1985 with more than 6.7 million reactions (3 million single-step and 3.7 million multi-step reactions) (March, 2003) derived from 400 000 documents (journals, patents, etc.). The records contain the following information ... 

CASREACT Database of abstracts related to reaction chemistry, including hazard/safety information American Chemical Society (Chemical Abstract Service)... 

CASREACT . 1840-. Columbus, OH Chemical Abstracts Service. Weekly. Contains single-step and multistep reaction information from journals and patent documents. Information consists of structure diagrams for reactants and products, CAS Registry numbers for all compounds listed, textual reaction information. Available online. 

Chemical Abstracts Service (CAS) has created a protocol for machine generation of multi-step reactions within a document from the single-step reactions which are input. This protocol is being used in the CASREACT database for both explicit and imphed multi-step reactions. Both the input data and the output are described. Special features of this tool include ... 

Bob Dana and colleagues at Chemical Abstracts Service presented a poster on the machine generation of multi-step reactions for the CASREACT system on STN International. The online version of FIZ s Cheminform database will be available on STN International also. Alex Parlow gave a poster presentation on the creation of Cheminform both as an electronic database (for onhne and in-house use) and as a printed product. 

The first commercial computer system to store, search and retrieve reaction schemes was ChemBase (see Figure 1). ChemBase could represent and display linear schemes, but was limited in its ability to perform scheme-oriented structure searches (see below). The Chemical Abstracts Service (CAS) has announced the availability of their reaction file (CASREACT)," organised with reaction schemes in mind. Although at present the scheme searching capabilities available at the user interface are limited, CASREACT appears to represent schemes in a more rigorous manner internally, allowing further user interface refinements in the future. 

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