22013-86-1Relevant articles and documents
Organocatalytic Asymmetric Synthesis of Aza-Spirooxindoles via Michael/Friedel-Crafts Cascade Reaction of 1,3-Nitroenynes and 3-Pyrrolyloxindoles
Ni, Qijian,Wang, Xuyang,Zeng, Da,Wu, Qianling,Song, Xiaoxiao
, p. 2273 - 2278 (2021/04/05)
An asymmetric [3+3] cyclization of nitroenynes and 3-pyrrolyloxindoles has been realized with a chiral bifunctional squaramide catalyst. This Michael/Friedel-Crafts cascade strategy provides a facile and efficient access to enantioenriched polycyclic aza-spirooxindoles with 32-95% isolated yields and excellent stereocontrol under mild reaction conditions.
A novel tandem sequence to pyrrole syntheses by 5-endo-dig cyclization of 1,3-enynes with amines
Bharathiraja, Ganesan,Sakthivel, Sekarpandi,Sengoden, Mani,Punniyamurthy, Tharmalingam
, p. 4996 - 4999 (2013/10/22)
The synthesis of pentasubstituted pyrroles has been described using molecular iodine from 1,3-enynes and amines via a sequential tandem aza-Michael addition, iodocyclization, and oxidative aromatization. The protocol is simple and efficient to afford the target products at ambient conditions.
SYNTHESIS OF 2-HALOGENO-2-NITROETHENYLARENES
Aleksiev, D. I.,Ivanova, S. M.
, p. 1845 - 1848 (2007/10/02)
A series of 2-halogeno-2-nitroethenylarenes were obtained as a result of the condensation of halogenonitromethanes with aromatic (heterocyclic) aldehydes in the presence of catalytic amounts of ethylenediamine and also by the addition of halogenonitromethanes to butylarylimines in acetic anhydride.