100656-22-2Relevant academic research and scientific papers
Syntheses and Properties of 1,3-Dialkoxy-2-azapropenylium Salts
Wuerthwein, Ernst-Ulrich,Kupfer, Rainer
, p. 1557 - 1568 (2007/10/02)
16 novel substituted 1,3-dialkoxy-2-azapropenylium salts 1 have been prepared by alkylation with trialkoxonium salts at the oxygen atom of the N-acylimidates 3.Indications for a competing N-alkylation reaction were found in the preparations of 1ka and 1lc.All new salts 1 (except for 1ic and 1lc) were proven by NMR spectroscopic studies to adopt a chiral, bent, or almost linear ground state geometry of structural type a) or c); this agrees well with the IR properties of the salts.Detailed spectroscopic data (1H NMR, 13C NMR, IR, and FD mass spectroscopy) are included.
Synthesis and Properties of Substituted 1-Alkoxy-2-azaallenium Salts
Kupfer, Rainer,Wuerthwein, Ernst-Ulrich
, p. 857 - 871 (2007/10/02)
12 novel substituted 1-alkoxy-2-azaallenium salts 1 have been prepared by reaction of the N-methyleneamides 3 with trialkyloxonium salts 4.During the alkylation reaction of the N-benzylideneamides 3m, n a formal disproportionation takes place to yield hig
