Nurul H Ansari

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A palladium catalyzed, carbon monoxide mediated, double reductive cyclization of 1,4-, 1,3-, and 2,3-bis(2-nitroaryl)-1,3-butadienes to afford 2,2'-, 2,3'-, and 3,3'-biindoles, respectively, was developed. In contrast, reductive cyclizations of 1,2-bis(2-nitroaryl)ethenes were nonselective, affording mixtures of monocyclized indoles, indolo[3,2-b]indole,(More)
The naturally occurring polybrominated indoles 2,2',5,5'-tetrabromo-3,3'-bi-1H-indole, 2,2',6,6'-tetrabromo-3,3'-bi-1H-indole, and 2,2',5,5',6,6'-hexabromo-3,3'-bi-1H-indole were synthesized using a palladium catalyzed, carbon monoxide mediated, double reductive N-heterocyclization of 2,3-bis(2-nitro-4(or 5)-bromophenyl)-1,4-butadienes as the key step.
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