October 1998 Chem. Pharm. Bull. 46(10) 1501—1505 (1998) 150] Synthesis of Anacardic Acids Utilizing an Annelation Reaction of Isoxazoles with Ethyl Acetoacetate Mitsuru SATOH,* Naoki TAKEUCHI, Takeshi FUJITA, Katsuya YAMAZAKI, and Seisho TOBINAGA Showa College of