Publisher： John Wiley & Sons Inc
E-ISSN： 1099-0690|2018|4|485-493
ISSN： 1434-193x
Source： EUROPEAN JOURNAL OF ORGANIC CHEMISTRY, Vol.2018, Iss.4, 2018-01, pp. : 485-493
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Abstract
A new and in situ formed reagent generated by mixing PIFA {bis[(trifluoroacetoxy)iodobenzene]} and AlCl3 was introduced in the organic synthesis for the direct and highly regioselective ortho‐chlorination of phenols and phenol ethers. An efficient electrophilic chlorination for these electron‐rich arenes as well as the scope of the reaction are described herein. An easy, practical, and open‐flask reaction allowed us to introduce a chlorine atom, which is a highly important functional group in organic synthesis. The reproducibility of our method has been demonstrated on gram‐scale by carrying out the reaction in 6‐bromo‐2‐naphthol. This halogenation reaction also proceeds in excellent conditions by first preparing the iodine(III)‐based chlorinating reagent. Our new chlorinating reagent can be stored at least for two weeks at 4 °C without losing its reactivity.
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