Abstract
Abstract Unsymmetrically substituted 5-membered cyclic ethers were effectively cleaved with the A1C1 3 -NaI-CH 3 CN system at the less hindered carbon atom to afford δ-iodoalcohols. Conversion of ent -kaurene to ent -14α- and ent -12β-hydroxykaurene was achieved through the ring opening of the cyclic ether with the present system as a key step.
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