Wikipedia
Reaxys
Reaxys is a web-based tool for the retrieval of chemistry information and data from published literature, including journals and patents. The information includes chemical compounds, chemical reactions, chemical properties, related bibliographic data, substance data with synthesis planning information, as well as experimental procedures from selected journals and patents. It is licensed by Elsevier.
Reaxys was launched in 2009 as the successor to the CrossFire databases. It was developed to provide research chemists with access to current and historical, relevant, organic, inorganic and organometallic chemistry information, from reliable sources via an easy-to-use interface.