Retrosynthe.tk  Synthesis Resources for the Practical Chemist
External Resources for the Practical Chemist

Practical Synthesis

Prepchem.com - Notes on specific organic and inorganic preparations

Sciencemadness.org - A wiki, forum, and library for independent chemistry, with notes on various reactions and preparations

Orgsyn.org - Publications of important reactions, with preparatory notes

sdbs.db.aist.go.jp/sdbs/cgi-bin/direct_frame_top.cgi - Compound spectral database

Chemicalforums.com - General chemistry forum with practical reaction notes

Reaction Listings

Organic-Chemistry.org - Organic reactions, reagents, and news, and a program for molecular property estimation

Training

https://legacyweb.chemistry.ohio-state.edu/flashcards/ - Synthetic Organic Flashcards

More content coming soon!