- Microwave-Induced Reactions of Organic Substrates in the Cage of Zeolites
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Microwave irradiation of compounds 1, 7, 15, 19, 23, and 24 adsorbed on Y zeolites has been studied.The reaction rate of the corresponding rearrangement, dehydrogenation and dehydration is dramatically enhanced as compared with reactions under thermal conditions.
- Ipaktschi, Junes,Brueck, Matthias
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p. 1591 - 1593
(2007/10/02)
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- Selective Demethylative Cyclisation of 2-Methoxy-allylbenzenes
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Treatment of 3-substituted 2-methoxyallylbenzenes with dry HBr in CHCl3 causes selective demethylative cyclisation to give 7-substituted 2-methyl-2,3-dihydrobenzofurans.The reaction involves mutual participation of allyl and 2-methoxyl groups and is sterically accelerated by substituents vicinal to OCH3.The reaction does not take place in high dielectric solvents such as DMF or DMSO.A propable mechanism envisaging a non-classical ionic transition state is proposed and the synthetic utility of this reaction is also demonstrated.
- Devakumar, C.,Mukerjee, S. K.
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p. 368 - 372
(2007/10/02)
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