✍ Scribed by Henrik Junge; Günther Oehme
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3,4-Dimethyl-6-perfluoroheptyl-2,5-dihydropyridine (1) is obtained by hetero Diels-Alder reaction between 2,3dimethyl-l,3-butadiene and perfluorooctanonitrile at 50°C and pressures of 1 and 1500 bar, respectively. 1 gradually eliminates hydrogen to give 3,4-dimethyl-6-perfluoroheptylpyridine (2). The investigation of influence of high pressure on this reaction showed a significant increase of yields of both heterocyclic compounds at 1500 bar.
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## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable v
Hetero Diels-Alder reactions, intramolecular / High-pressure reactions / Diastereoselectivity / Pyrans / 1 -Oxa-l,3-butadiens / Isoxazolones The intramolecular hetero Diels-Alder reaction of the benzylidene-isoxazolone 3 giving the adducts 4 and 5 is studied in dichlormethane under high pressure up
3-Methylsulfanylfuran and 3-phenylsulfanylfuran were found to undergo facile, regioselective and stereoselective Diels-Alder (DA) cycloaddition to a variety of cycloalkenones under high pressure to give the corresponding ringannulated 7-oxabicyclo[2.2.