New reactions of 4,15-diamino[2.2]paracyclophane (1) are described. When 1 is reacted with acetyl, benzoyl, or phthaloyl chloride, respectively, the amides 2, 6, 7, and 9 are formed; the latter suffers loss of H2O to give the product 8. Bromination of 2 yields the pseudo-geminally substituted derivative 3 exclusively; the formation of its expected regioisomer 4 is not observed. Heating of 2 with POCl3 in ethanol furnishes the triply-bridged cyclophane 5. Condensation of 1 with some selected carbonyl compounds (phthalaldehyde, formic acid, cyclohexane- 1,3-dione, and terephthalaldehyde) provides the products 17-20. Thiourea and isothiocyanate derivatives 21 and 22 were obtained on heating 1 in CS2. The structures of the products were assigned on the basis of their spectroscopic and analytical data. Rationalizations for the formation of 3, 5, 6, and 17 are presented.
CITATION STYLE
El-Shaieb, K. M., Mourad, A. F. E., & Hassan, A. A. (2015). 4,15-Diamino[2.2]paracyclophane as a useful precursor for the synthesis of novel pseudogeminal [2.2]paracyclophane compounds. Zeitschrift Fur Naturforschung - Section B Journal of Chemical Sciences, 70(11), 843–850. https://doi.org/10.1515/znb-2015-0093
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