Dieter Seebach is a German chemist known for his synthesis of biopolymers and dendrimers, and for his contributions to stereochemistry.

After his habilitation he became professor for organic chemistry at the University of Giessen.

After six years he was appointed professor at the ETH Zurich where he worked until he retired in 2003.

Seebach worked on dendrimer chemistry and on the synthesis of beta-peptides.

[1][2] The development of the umpolung, a polarity inversion of the carbonyl group, with 1,3-propanedithiol together with Corey had a big influence on organic synthesis, and subsequently the Corey-Seebach reaction was named after them.