Synthesis of benzo[b]carbazoloquinones by coupling of organostannanes with bromoquinones
摘要:
The synthesis of 5-carbonitrile-1,7-dihydroxy-3-methyl-5H-benzo[b]carbazole-6,11-dione, the quinone originally proposed as prekinamycin, was completed by using a palladium and copper catalyzed Stille reaction as the key step. A subsequent heterocyclization afforded a mixture of para(benzo[b]carbazole-6,11-dione) and ortho (benzo[a]carbazole-6,11-dione) quinones. A procedure for the N-cyanation of model indoles is also described. (C) 1997 Elsevier Science Ltd.
Synthesis of benzo[b]carbazoloquinones by coupling of organostannanes with bromoquinones
摘要:
The synthesis of 5-carbonitrile-1,7-dihydroxy-3-methyl-5H-benzo[b]carbazole-6,11-dione, the quinone originally proposed as prekinamycin, was completed by using a palladium and copper catalyzed Stille reaction as the key step. A subsequent heterocyclization afforded a mixture of para(benzo[b]carbazole-6,11-dione) and ortho (benzo[a]carbazole-6,11-dione) quinones. A procedure for the N-cyanation of model indoles is also described. (C) 1997 Elsevier Science Ltd.