Bimolecular Intermolecular-Michael/Intramolecular-Michael/Aromatization Reaction of 1-Cyanocyclopropane 1-Esters or 1,1-Dicyanocyclopropanes: A Straightforward Approach to Fully Substituted Benzenes
摘要:
An efficient and straightforward synthetic protocol has been developed for the preparation of fully substituted benzenes via a [3+3]-cyclodimerization reaction of 1-cyanocyclopropane 1-esters or 1,1-dicyanocyclopropanes for the generation of a wide range of structurally interesting significant compounds. The reaction utilizes Et3N-promoted C-C bond cleavage, two new C-C bond formations of 1-cyanocyclopropane 1-ester and simultaneous aromatization by removal of cyano and ester groups in a domino fashion.
Formal [3+2] cycloaddition of 1-cyanocyclopropane 1-ester with pyridine, quinoline or isoquinoline: a general and efficient strategy for construction of cyanoindolizine skeletons
作者:Juanjuan Liu、Lanxiang Zhou、Weijian Ye、Cunde Wang
DOI:10.1039/c4cc03267e
日期:——
An efficient and straightforward preparation of cyanoindolizine derivatives via a cycloaddition reaction between 1-cyanocyclopropane 1-ester and pyridine or benzopyridine.
Efficient strategy for construction of 6-carbamoylfulvene-6-carboxylate skeletons via [3 + 2] cycloaddition of 1-cyanocyclopropane 1-ester with β-nitrostyrenes
作者:Chen Tan、Weijian Ye、Juan Yao、Juanjuan Liu、Shuwen Xue、Yang Li、Cunde Wang
DOI:10.1039/c5ra02918j
日期:——
An efficient and straightforward the preparation of 6-carbamoylfulvene-6-carboxylates via a cycloaddition reaction between 1-cyanocyclopropane 1-ester and β-nitrostyrenes.
One-Pot Synthesis of Highly Substituted Pyrroles by Three-Component Reactions of Donor-Acceptor Cyclopropanes, Salicylaldehydes, and Ammonium Acetate
作者:Zhenjie Su、Wenxing Gu、Siran Qian、Shuwen Xue、Cunde Wang
DOI:10.1002/ejoc.201701674
日期:2018.2.28
rile derivatives have been synthesized efficiently by the one‐pot three‐component reactions of donor–acceptor cyclopropanes, salicylaldehydes, and ammoniumacetate in the presence of triethylamine. With ammoniumacetate as the nitrogen source, a variety of highly substituted pyrroles were obtained in moderate‐to‐excellent yields under mild conditions.
Solvent-Free DABCO-Mediated [3 + 2] Cycloadditions of Donor–Acceptor Cyclopropanes with Aldehydes: Strategy for Synthesis of Fully Substituted Furans
作者:Jiaming Liu、Weijian Ye、Xushun Qing、Cunde Wang
DOI:10.1021/acs.joc.6b01259
日期:2016.9.2
DABCO-mediated [3 + 2] cycloadditions of donor–acceptor cyclopropanes with aldehydes under solvent-free conditions have been developed for the preparation of fully substituted furans which are a wide range of structurally interesting and pharmacologically significant compounds. The reaction appears to be general for a variety of 1-cyanocyclopropane-1-carboxylates and aldehydes and tolerates the presence
Iodine-Promoted Domino Reactions of 1-Cyanocyclopropane 1-Esters: A Straightforward Approach to Fully Substituted 2-Aminofurans
作者:Weijian Ye、Chen Tan、Juan Yao、Shuwen Xue、Yang Li、Cunde Wang
DOI:10.1002/adsc.201500078
日期:2016.2.4
ring‐opening/cyclization domino reaction of 1‐cyanocyclopropane 1‐esters for the synthesis of fully substituted 2‐aminofurans is reported. This reaction involves the sequential ring‐opening/intramolecular cyclization reaction of 1‐cyanocyclopropane 1‐esters to give the corresponding 2‐amino‐4,5‐dihydrofurans, which were oxidized with I2 and Et3N in refluxing toluene to give the corresponding 2‐amino‐3‐furancarboxylates