Unveiling Hetero-Enyne Reactivity of Aryliminoboranes: Dearomative Hetero-Diels-Alder-Like Reactions.
Angew Chem Int Ed Engl
; 61(34): e202205814, 2022 Aug 22.
Article
in En
| MEDLINE
| ID: mdl-35713957
ABSTRACT
Being isoelectronic with alkynes, iminoboranes with a polar B≡N triple bond have been exclusively investigated as a potent 1,2-dipole in synthetic chemistry. Herein, we disclose the unprecedented reactivity of aryliminoboranes via the BNCC π conjugation, namely hetero-enyne behavior. This allows for facile dearomative Diels-Alder-like reactions of aryliminoboranes with aldehydes. This cycloaddition features mild conditions, is catalyst-free, and has a broad substrate scope and good functional group tolerance. Kinetic and computational studies reveal its second-order reaction and concerted cyclization mechanism. This report unveils new synthetic application of iminoboranes beyond their classical reaction patterns.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Angew Chem Int Ed Engl
Year:
2022
Document type:
Article
Affiliation country:
China