Abstract
A three-component coupling of aldehydes, homoallylic alcohols and ammonium thiocyanate is achieved in the presence of 10 mol % of In(OTf) 3 in refluxing dichloromethane to produce 4-thiocyanotetrahydropyrans in excellent yields with all cis-selectivity. This method is simple, selective and convenient for introducing an SCN group onto a tetrahydropyran ring.
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