… Part 3: Bis-oxo-bridged calix [1] cyclicurea [3] arene and calix [1] cyclicurea [1] pyridine [2] arenes. Synthesis, X-ray crystal structure and conformational analysis 1

S Kumar, D Paul, G Hundal, MS Hundal…

Index: Kumar, Subodh; Paul, Dharam; Hundal, Geeta; Hundal, Maninder Singh; Singh, Harjit Journal of the Chemical Society, Perkin Transactions 1, 2000 , # 6 p. 1037 - 1043

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Citation Number: 9

Abstract

The Friedel–Crafts aroylations of 2-and 4-methylanisole with isophthaloyl dichloride or pyridine-2, 6-dicarbonyl dichloride provide respective diones, which on bromination with NBS provide corresponding bisbromomethyl derivatives that undergo simple cyclocondensations with embedded cyclicurea-containing heterocycles, viz. benzimidazol-2 (1H)-one, 5-nitrobenzimidazol-2 (1H)-one, 5, 6-dinitrobenzimidazol-2 (1H)-one, uracil and ...