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Table 2 Yield % of the synthesized bis(imidazo[1,2- a ]pyridine) and bis(imidazo[1,2- a ]pyrimidine) derivatives 8a-e and 9a-d

From: Microwave assisted synthesis of bis and tris(ω-bromoacetophenones): versatile precursors for novel bis(imidazo[1,2-a]pyridines), bis(imidazo[1,2-a]pyrimidines) and their tris-analogs

Entry X Y 8a-e( o-isomer) Yield%a Yield%a
     Δ MW
1 2 CH 8a 78 81
2 3 CH 8b 69 74
3 4 CH 8c 72 89
4 2 N 8d 53 70
5 3 N 8e 63 83
    9a-d( p- isomer)   
6 3 CH 9a 55 82
7 4 CH 9b 65 87
8 3 N 9c 68 78
9 4 N 9d 64 86
  1. aYields of isolated compounds.