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An alternate reaction mechanism for the boron tribromide mediated deprotection of aryl propargyl ethers based on the isolation of a key boron-containing byproduct is proposed. On the basis of the new mechanistic insight, we discovered that HBBr(2) x SMe(2) can also be used for cleaving aryl propargyl ethers.
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Yao et al. (2008) studied this question.
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