Acetic acid (E)-(1S,7R,9R,10S)-10-chloromethyl-9,10-dihydroxy-7-isopropyl-4-methylene-cyclodec-5-enyl ester 在
sodium hydride 作用下,
以
四氢呋喃 为溶剂,
以82%的产率得到Acetic acid (E)-(3R,4R,10S,12S)-12-hydroxy-10-isopropyl-7-methylene-1-oxa-spiro[2.9]dodec-8-en-4-yl ester