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Treatment of 5-iodo-1-(methylthio)-1-(p-tolylsulfonyl)-1-pentene with (n-Bu)3SnH and AIBN gave [(methylthio)(p-tolylsulfonyl)methyl]cyclobutane. This is due to the stability of an intermediary radical attached to methylthio and p-tolylsulfonyl groups.
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Ogura et al. (1992) studied this question.
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