摘要:
The first total synthesis of the highly unstable biological mediator 12-ketoeicosatetraenoic acid (12-KETE) 3 and its 8,9-trans-isomer 20 is presented. The strategy focuses on the stable precursor dithiane 13 and its conversion to 9 and 20. Biochemical experiments show that the two isomers are not interconverted in vivo, raising the possibility that the trans-isomer 20 may be formed by a primary biochemical mechanism.