The University of Cambridge currently has a free trial access to Science of Synthesis until 31 March.
From the SoS website:
Science of Synthesis helps you get up to speed on a chosen field of research quickly and complete the design of your synthetic strategy.
It is your online synthetic methodology tool for the most reliable chemical transformations available! SOS is the ONLY resource providing full-text reviews of organic and organometallic transformations as well as experimental procedures.
Written by chemists for chemists, SOS provides expert recommendations from over 1,750 contributors as well as unique insights into the scope and limitations of synthetic methods.
Furthermore the Houben-Weyl content is available as a back file.
It would be great if you could inform your users about the availability. As well as chemistry several other departments will also benefit, such as medicine, biochemistry, materials science, pharmacology, chemical engineering.
To access Science of Synthesis (on- and off-campus) please use this URL: http://ezproxy.lib.cam.ac.uk:2048/login?url=https://science-of-synthesis.thieme.com/.
In order for you to have the best possible result from using Science of Synthesis, a Getting Started Manual can be found at http://www.science-of-synthesis.com/prod/pdf/SoS-40-Quick-Start-Guide.pdf
There are also several video tutorials at https://www.thieme.de/en/thieme-connect/science-of-synthesis-tutorials-50028.htm
It is really important that you give your feedback on this product so we know whether it is worth recommending for purchase, and to support any recommendation. Please send your feedback to Clair Castle, Librarian, Department of Chemistry, at firstname.lastname@example.org.