Various pyrano[2,3-c]carbazoles are synthesized in high yields over five steps from commercially available resorcinol. Palladium-catalyzed arylation remains a key step in this novel strategy. The versatility of this protocol has been demonstrated by the first total synthesis of naturally occurring carbazole clauraila C.
利用商业可获得的
间苯二酚,可以在五个步骤内高产率合成各种
吡喃并[2,3-
c]
咔唑。在这种新颖策略中,
钯催化芳基化仍然是关键步骤。这种方案的多功能性已经通过首次全合成天然存在的咔唑类化合物克劳拉拉C得到证明。