Transposition of Aromaticity from a Furan to a Cyclohexane Ring in Furoisoindoles During the Interaction of 3-(Furyl)allylamines with Bromomaleic Anhydride.

Autor: Alekseeva, Kseniia A., Kvyatkovskaya, Elizaveta A., Nikitina, Eugeniya V., Zaytsev, Vladimir P., Eroshkina, Svetlana M., Shikhaliev, Khidmet S., Truong, Hieu H., Khrustalev, Victor N., Zubkov, Fedor I.
Předmět:
Zdroj: Synlett; 2020, Vol. 31 Issue 3, p255-260, 6p
Abstrakt: An unexpected four-step reaction sequence was discovered in the course of investigation of the interaction between 3-(furan-2-yl)allylamines and bromomaleic anhydride. This conversion begins with the initial N -acylation of the allylamines by the anhydride, followed by intramolecular Diels–Alder reaction, which is accompanied by a dehydrohalogenation, and ends with the formation of partially unsaturated furo[2,3- f ]isoindoles followed by transposition of aromaticity from the furan moiety to the neighboring cyclohexane ring. The reaction between 3-(furan-3-yl)allylamines and bromomaleic anhydride does not stop at a furo[2,3- f ]isoindole formation step, but proceeds further with the cleavage of the furan ring in a 100% atom-efficient fashion to provide polysubstituted isoindoline-4-carboxylic acids. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index