Science of Synthesis (SoS) has released a new update.
New features include:
- Enhanced text search functionality
- Better Structure/Reaction Searching and Retrieval
- DOI's to increase linking to literature
Science of Synthesis has 4 short tutorials to introduce you to the new features.
Science of Synthesis was written by chemists for chemists and "provides a critical review of the synthetic
methodology developed from the early 1800s to-date for the entire field
of organic and organometallic chemistry."
Here's a quick overview of SoS.