Cupped azacyclophanes based on a m-terphenyl framework: conformational features of their N-tosylamide precursors
TK Vinod, H Hart
Index: Vinod, Thottumkara K.; Hart, Harold Journal of Organic Chemistry, 1990 , vol. 55, # 20 p. 5461 - 5466
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Citation Number: 21
Abstract
Tetrabromomethyl m-terphenyl4 was used to construct tetrakis-N-tosylamide cuppedophanes 8-10 and, by detosylation, the corresponding tetraazacuppedophanes 17- 19. The para-and meta-bridged tosylamides 8 and 9 are conformationally rigid, but the ortho- bridged isomer 10 is conformationally mobile. At low temperatures diagonally opposite tosylamide groups are magnetically equivalent but form two nonequivalent seta which ...
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