Anomalous Behaviour of cis-Bicyclo[3.3.0]octane-3,7-dione and Its Derivatives During Twofold Fischer Indole Cyclization Using Low-Melting Mixtures
作者:Sambasivarao Kotha、Ajay Chinnam
DOI:10.1055/s-0033-1340341
日期:——
Fischer indole cyclization to deliver the unusual Cs -symmetrical product pentaleno[2,1-b:5,6-b′]diindole, along with the expected C2 -symmetrical pentaleno[2,1-b:5,4-b′]diindole product. We have developed an efficient method for the synthesis of the pentaleno[2,1-b:5,4-b′]diindole and pentaleno[2,1-b:5,6-b′]diindole skeletons via twofold Fischer indole cyclization. In this new procedure, cis-bicyclo[3
摘要 我们已经开发了一种有效的方法为并环戊二烯并合成[2,1- b:5,4- b ']二吲哚并并环戊二烯并[2,1- b:5,6- b ']二吲哚骨架通过双重费歇尔吲哚环化。在这种新方法中,在1 -(+)-酒石酸和N的低熔点混合物存在下,用1-甲基-1-苯基肼处理顺式-双环[3.3.0]辛烷-3,7-二酮,N'-二甲基脲在70°C进行两次费歇尔吲哚环化反应,以生成不寻常的C s-对称产物pentaleno [2,1- b:5,6- b ']二吲哚以及预期的C 2- 对称的pentaleno [2,1- b:5,4- b ']二吲哚产物。 我们已经开发了一种有效的方法为并环戊二烯并合成[2,1- b:5,4- b ']二吲哚并并环戊二烯并[2,1- b:5,6- b ']二吲哚骨架通过双重费歇尔吲哚环化。在这种新方法中,在1 -(+)-酒石酸和N的低熔点混合物存在下,用1-甲基-1-苯基肼处理顺式-双环[3
Kotha, Sambasivarao; Chinnam, Ajay Kumar; Sreenivasachary, Nampally, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2016, vol. 55B, # 9, p. 1107 - 1111