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3N. Although good yields of stilbenoids 9 can obtained, we do not recommend this procedure as it leads to a complex purification of stilbenoids 9.
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3N. Although good yields of stilbenoids 9 can obtained, we do not recommend this procedure as it leads to a complex purification of stilbenoids 9.
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The mechanism does not seem to involve a carbon-sulfur bond breakage, resulting in a carbon radical that would abstract a proton from the solvent, as irradiation of p -tolyl p -tolylmethyl sulfone and allyl p -tolyl sulfone in the presense of DBU leads to recovery of the starting compounds. In both compounds a carbon-sulfur bond breakage would be particularly easy as it would produce very stabilized p -methylbenzyl or allyl radicals.
-
The mechanism does not seem to involve a carbon-sulfur bond breakage, resulting in a carbon radical that would abstract a proton from the solvent, as irradiation of p -tolyl p -tolylmethyl sulfone and allyl p -tolyl sulfone in the presense of DBU leads to recovery of the starting compounds. In both compounds a carbon-sulfur bond breakage would be particularly easy as it would produce very stabilized p -methylbenzyl or allyl radicals.
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