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Convenient synthesis of new functionalized cyclopropanes from monoterpenic olefines

“…11 A comparison with the original Makosza method showed similar yields, but the process with solid base was proved to be faster. [10][11] Earlier 12 , Sirovski and al. have published the work discussing various models of phasetransfer catalysed reactions in the different solid/liquid systems.…”

“…The primary advantages of using phase-transfer catalysis are to obtain a large conversion, high reaction rate and selectivity at moderate reaction conditions. [8][9][10] It is interesting to note that powdered KOH or NaOH/BTEAC/CHCl 3 has been suggested as a very effective CCl 2 precursor. 11 A comparison with the original Makosza method showed similar yields, but the process with solid base was proved to be faster.…”

Cyanines Bearing Quaternary Azaaromatic Moieties

“…In continuation of our study concerning quaternary azaaromatics, [1][2][3][4][5][6][7][8] we here present selected examples of cyanines bearing quaternary azaaromatic moieties. Quaternary azaaromatics are components of supramolecular systems promising for the design of molecular switches and machines, a theme being intensively studied now; 9-14 they may be used as synthons in a number of reactions [15][16][17] and they show biological activities.…”

Endo and regioselectivity in 1,3-dipolar cycloaddition of pyridazinium N-ylides with a non-symmetrical cyclic olefin

“…[1][2][3][4][5][6][7][8][9][10][11][12][13] Cycloaddition reactions between pyridazinium phenacylides and symmetrical N-substituted maleimides were first reported in 1979 14 but the stereochemistry of the ensuing cycloadducts was investigated only more recently. 10-13 Herein we report the 1,3-dipolar cycloaddition reaction between pyridazinium N-ylides 4 and the non-symmetrical 3-methyl-N-phenylmaleimide 5 giving the cycloadducts 6 and 7.…”