49618-59-9Relevant academic research and scientific papers
Synthesis of 1,2-Dicyano-3-arylcycl[3.2.2]azines – First 1,2-Dicarbonitriles Based on Cyclazine Heterocycle
Chernyak, Alexander V.,Kalashnikov, Valery V.,Kazachenko, Vladimir P.,Pushkarev, Victor E.,Simakov, Anton O.,Simonov, Sergey V.,Starikov, Andrei S.,Tarakanov, Pavel A.,Tkachev, Valery V.,Tomilova, Larisa G.,Yarkov, Alexander V.,Zhurkin, Fedor E.
, p. 5852 - 5856 (2020/09/21)
The first 1,2-dicarbonitriles have been prepared for cyclazine systems. In particular, a synthetic procedure to 1,2-dicyano-3-arylcycl[3.2.2]azines has been developed. Unexpected chlorination of 3-arylcycl[3.2.2]azine-1,2-dicarboxylic acid derivatives by thionyl chloride at 4-position was found, which according to theoretical considerations can proceed by the electrophilic (SEAr) mechanism. The compounds are blue fluorophores in 450–480 nm region with quantum yields in toluene of ca. 30 % for non-chlorinated derivatives, which decrease to 3–4 % for chlorinated ones.
Synthesis of Pyrrolo[2,1,5- cd]indolizine Rings via Visible-Light-Induced Intermolecular [3+2] Cycloaddition of Indolizines and Alkynes
Zhang, Yu,Yu, Yue,Liang, Bing-Bing,Pei, Yong-Yan,Liu, Xiang,Yao, Hua-Gang,Cao, Hua
, p. 10719 - 10727 (2020/09/18)
A range of indolizine smoothly underwent visible-light-induced intermolecular [3+2] annulations with internal alkynes to afford pyrrolo[2,1,5-cd]indolizine in good to excellent yields with high regioselectivity. Through this cascade reaction, a series of fluoroactive fused indolizines with a large π-system were conveniently synthesized. The usage of visible light as energy source with air as a stoichiometric oxidant under simple conditions makes this process attractive and practical.
Microwave promoted synthesis of cycl[3.2.2]azines in water via a new three-component reaction
Gogoi, Shyamalee,Dutta, Mandakini,Gogoi, Junali,Boruah, Romesh Chandra
, p. 813 - 816 (2011/03/18)
A microwave-promoted and base-catalyzed synthesis of cycl[3.2.2]azines is accomplished in water via a three-component reaction (3-CR) of 2-picoline, α-bromoacetophenone and alkyne. The extension of the methodology to the synthesis of steroidal and carbocyclic cycl[3.2.2]azine is also reported.
ADDITION REACTION OF INDOLIZINE DERIVATIVES WITH DIMETHYL ACETYLENEDICARBOXYLATE
Yamashita, Yoshiro,Suzuki, Daisuke,Masumura, Mitsuo
, p. 705 - 708 (2007/10/02)
Indolizine derivatives 1 reacted with dimethyl acetylenedicarboxylate to give 1:1 adducts 2-6.In some cases 1:2 adducts 7 were obtained from which cyclazine derivatives 11 were synthesized by dehydrogenation.The addition reaction was dependent on t
1,2-DIALKOXYCARBONYLHYDRAZINE DERIVATIVES OF PYRROLES AND INDOLIZINES. A NEW SYNTHESIS OF CYCLAZINES
Flitsch, Wilhelm,Heinrich, Juergen
, p. 3673 - 3676 (2007/10/02)
The reaction of pyrroles 1 with diisopropyl azodicarboxylate 2 yields 2- and 2,5-substituted derivatives. 3- and 1,3-substituted indolizines 5 and 6 are formed by the same route.Cyclazines 7 have been obtained from 5 and 6 with dimethyl acetylenedicarboxylate.
