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pro vyhledávání: '"Björn Sievers"'
Autor:
Benoit Louis, Ivo C. Ivanov, Björn Sievers, Wolfgang Frey, Jochen Mezger, Jean Sommer, Xavier Samain, Willi Kantlehner, Georg Ziegler, Silvia Leonhardt
Publikováno v:
Zeitschrift für Naturforschung B. 74:709-732
By treatment of ethers of phenol, resorcinol, 2-napththol, alkylanisoles 10, 13, 15, 17, 20, 22, 24, 28 with formic acid/borontrichloride the aromatic aldehydes 11, 14, 16, 18, 21, 23, 25, 26, 29 can generally be prepared in low yields. The formylati
Autor:
Edmont V. Stoyanov, Willi Kantlehner, Wolfgang Frey, Ralf Kreß, Jochen Mezger, Gerhard Simchen, Björn Sievers
Publikováno v:
Zeitschrift für Naturforschung B. 60:231-241
The diformylation of the dinitriles 4 and diesters 7 with the Bredereck-Simchen reagent HC[N(CH3)2]2[OC(CH3)3] (1) under microwave irradiation give the bis-enamines 6 and 8 with dramatically reduced reaction times and improved yields compared to conv