合成路线1

The intermediate iodovinyl compound (XI) has been obtained as follows: The reaction of 2-(hydroxymethyl)thiazole-4-carboxylic acid ethyl ester (I) with Troc-Cl and pyridine in dichloromethane gives the protected compound (II), which is reduced with DIBAL in the same solvent to yield the carbaldehyde (III). The condensation of aldehyde (III) with phosphorane (IV) in refluxing benzene affords the unsaturated aldehyde (V), which is asymmetrically allylated by means of (+)-diisopinocampheyl(allyl)borane in pentane to provide the chiral secondary alcohol (VI). The reaction of (VI) with Tbdms-Cl and lutidine in dichloromethane gives the silyl ether (VII), which is oxidized at the terminal double bond by means of OsO4 and Pb(OAc)4 to yield the aldehyde (VIII). The condensation of (VIII) with phosphorane (IX) and LiOH in THF affords the iodovinyl compound (X), which is finally treated with Troc-Cl and pyridine to provide the desired iodovinyl intermediate (XI).