883526-76-9Relevant academic research and scientific papers
Synthesis of Carbazoles and Dihydrocarbazoles by a Divergent Cascade Reaction of Donor-Acceptor Cyclopropanes
Faltracco, Matteo,Damian, Matteo,Ruijter, Eelco
supporting information, p. 7592 - 7596 (2021/10/12)
An alkylation/olefination cascade of indolecarboxaldehydes and phosphonate-functionalized donor-acceptor cyclopropanes affords functionalized dihydrocarbazoles and cyclohepta[cd]indoles in formal (3 + 3) and (4 + 3) cycloadditions. A minor modification to the reaction conditions also allows access to the fully aromatic heterocyclic scaffolds by thermal loss of an electron-rich aryl moiety.
Cycloaddition of in Situ Formed Azaoxyallyl Cations with 2-Alkenylindoles: An Approach to Tetrahydro-β-carbolinones
Zhang, Kaifan,Xu, Xiaoying,Zheng, Jiuan,Yao, Hequan,Huang, Yue,Lin, Aijun
, p. 2596 - 2599 (2017/05/24)
A novel [3 + 3] cycloaddition between in situ formed azaoxyallyl cations and 2-alkenylindoles has been developed. This concise method allows the efficient construction of a series of tetrahydro-β-carbolinones in good yields under mild conditions. Gram-sca
Zinc-Catalyzed Alkyne Oxidation/C-H Functionalization: Highly Site-Selective Synthesis of Versatile Isoquinolones and β-Carbolines
Li, Long,Zhou, Bo,Wang, Yong-Heng,Shu, Chao,Pan, Yi-Fei,Lu, Xin,Ye, Long-Wu
, p. 8245 - 8249 (2015/07/07)
An efficient zinc(II)-catalyzed alkyne oxidation/C£H functionalization sequence was developed, thus leading to highly site-selective synthesis of a variety of isoquinolones and β-carbolines. Importantly, in contrast to the well-established gold-catalyzed intermolecular alkyne oxidation, over-oxidation can be completely suppressed in this system and the reaction most likely proceeds by a Friedel-Crafts-type pathway. Mechanistic studies and theoretical calculations are described.
Construction of Benzo[c]carbazoles and Their Antitumor Derivatives through the Diels-Alder Reaction of 2-Alkenylindoles and Arynes
Sha, Feng,Tao, Yuan,Tang, Chen-Yu,Zhang, Fei,Wu, Xin-Yan
, p. 8122 - 8133 (2015/09/01)
The direct assembly of benzo[c]carbazole derivatives via the Diels-Alder reaction of arynes and easily accessible 2-alkenylidoles was reported. By employing different aryne precursor loads, 6,7-dihydrobenzo[c]carbazoles or aryl-substituted 7,11b-dihydrobenzo[c]carbazoles could be controllably generated in good to excellent yields under a nitrogen atmosphere. On the other hand, when the reaction was conducted under oxygen, oxidated/aromatized product benzo[c]carbazoles could be generated directly with high selectivity and efficiency in a one-step manner. Interestingly, the benzo[c]carbazole-5-carboxamide amidation derivatives of the above products showed good antitumor activities. The inhibitory effect of these molecules against cancer cells was also described.
Synthesis of carbazoles by gold(I)-catalyzed carbocyclization of 2-(enynyl)indoles
Praveen, Chandrasekaran,Perumal, Paramasivan Thirumalai
, p. 521 - 524 (2011/04/17)
A new synthetic protocol for carbazoles through gold(I)-catalyzed intramolecular hydroarylation of (Z)-2-(enynyl)indoles was achieved in good yields. The requisite (Z)-2-(enynyl)indoles were synthesized stereoselectively by trimethylgallium-promoted, Z-selective Wittig olefination of N-alkylindole-2-carboxaldehydes with propargyl ylides. Substrates possessing both alkyl as well as aromatic groups are well tolerated under these reaction conditions. Georg Thieme Verlag Stuttgart.
