Dehydro Amino Acids, Part 10. This work was supported by the Fonds zur Förderung der wissenschaftlichen Forschung in Österreich.—Part 9: ref. .—Also: Amino Acids and Peptides, Part 23.—Part 22: ref .
Schiff bases of type (1) are models for pyridoxal-containing enzymes. The outstanding ability of compounds (1) to undergo addition can be demonstrated with phenylmethanethiol.