This ACS Symposium Series is the product of a symposium held at the 241st National Meeting of the American Chemical Society. 2011. It includes chapters on new biobased building blocks such as the furandicarboxylic acid, polyesters and polyamides from adipic, succinic and sebacic acids with aliphatic diols such as 1, 3-propylene glycol, 1, 4-butanediol, 1, 12-dodecylenediol and isosorbide.