Synthesis of furan-fused 1,4-dihydrocarbazoles via an unusual Garratt-Braverman Cyclization of indolyl propargyl ethers and their antifungal activity
作者:Arundhoti Mandal、Santi M. Mandal、Saibal Jana、Subhendu Sekhar Bag、Amit K. Das、Amit Basak
DOI:10.1016/j.tet.2018.05.001
日期:2018.7
condition (KOBut in refluxing toluene) has been studied. Interestingly, these propargyl systems with one arm attached with substituted 3-indolyl derivatives leaving the other arm unsubstituted produced the 3,4-furan fused dihydrocarbazole derivatives 6a-6g (and not the expected carbazole derivatives) as the predominant product (70–82%) making this methodology to access such derivatives an attractive route.
A Garratt-Braverman cyclization route towards the synthesis of phenanthridine derivatives and their DNA-binding studies
作者:Arundhoti Mandal、Prabuddha Bhattacharya、Amit K. Das、Amit Basak
DOI:10.1016/j.tet.2019.02.020
日期:2019.3
cyclization has been employed to synthesize a series of dihydroisofuran fusedphenanthridine derivatives. The established protocol proposes a simpler synthetic alternative to have access to these therapeutically relevant cytotoxic scaffolds. Single crystal X-ray data unambiguously confirmed the structures of the synthesized phenanthridine derivatives. UV–Vis absorption titration with calf-thymus DNA followed