647016-73-7Relevant articles and documents
Bornane with integrated push-pull butadienes
Lalk, Michael,Peseke, Klaus,Reinke, Helmut
, p. 552 - 556 (2007/10/03)
The {3-[bis(alkylthio)methylene]-1,7,7-trimethylbicyclo[2.2.1]hept-2-ylidene} malononitriles ((1R,4S)-2, (1S,4R)-2 and (1R,4S)-3) were prepared starting from 1,7,7-trimethyl-bicyclo[2.2.1]hept-2-ylidenemalononitriles ((1R, 4R)-1 and (1S,4S)-1) arisen from (+)-, (-)-camphor. The reaction of (1R,4S)-2 with bromine yielded the (1S,8R)-8,11,11-trimethyl-3-methylthio-5-oxo-4-thiatricyclo-[6.2.1.0 2,7]undeca-2,6-diene-6-carbonitrile (8) after hydrolysis of the initially formed (1S,8R)-6-cyano-8,11,11-trimethyl-3-methylthio-4-thia-tricyclo[6.2.1.0 2,7]undeca-2,6-diene-5-iminium bromide (7). Wiley-VCH Verlag GmbH, 1999.