DFT studies on reactions of boroles with carbon monoxide

DFT calculations were performed to study systematically the influence of borole substituents on the reaction of boroles with carbon monoxide.

Synthesis and fluxional behaviour of novel chloroborole dimers

Two (B-Cl)-chloroboroles form unsymmetric dimers which are highly fluxional in solutionviareversible enantiomerisation through an intermediate with mirror symmetry.

Ring expansion reactions of anti-aromatic boroles: a promising synthetic avenue to unsaturated boracycles

The ability of anti-aromatic boroles to undergo ring expansion reactions with a broad range of substrates as an effective synthetic protocol towards a diverse array of 6-, 7-, and 8-membered boracycles is detailed in this review.

Oxygen insertion into boroles as a route to 1,2-oxaborines

The synthesis of 1,2-oxaborines is accomplishedviathe reaction of pentaarylboroles withN-methylmorpholine-N-oxideviaa 1,1-insertion reaction.

Probing the reactivity of pentaphenylborole with N–H, O–H, P–H, and S–H bonds

The reactions of molecules containing E–H functionalities (E = Group 15 or 16 element) and pentaphenylborole were investigated revealing diverse outcomes.

Peculiar Reactivity of Isothiocyanates with Pentaphenylborole

The reactions of isothiocyanates with the antiaromatic pentaphenylborole were investigated, revealing significantly different outcomes than the analogous reactions with isocyanates. The 1:1 stoichiometric reaction products isolated include a seven-membered BNC5 heterocycle and a fused bicyclic 4/5-ring system. Studies suggest that the seven-membered ring undergoes an intramolecular [2 + 2] electrocyclic ring closure to produce the bicyclic system. The only derivative for which stoichiometry influenced the reaction outcome was 4-methoxyphenylisothiocyanate. The reaction of borole with an excess of 4-methoxyphenylisothiocyanate resulted in the formation of a fused tetracyclic species with two equivalents of isothiocyanate incorporated into the product. Rational pathways for these unusual transformations are presented.