Boron halides reactions with

The coupling occurred at the less-hindered terminal carbon giving thermally stable ( )-allyl boronates. Thus, the (.E)- and (Z)-crotyl chloride, and 3-chloro-l-butene, all afforded an (A)-crotyl boronate. The reaction with benzyl halides gave benzyl boronates.333... 

Boron halides react with norbornadienes to produce 1,3-insertion products. As with insertion into simple alkenes, such reactions need forcing conditions that result in elimination and reduce the potential of the insertion reaction... 

Riccitiello et al. have synthesized preceramic polymers with Si—B bonds in their backbones by a Wurtz analogous reaction of dialkyldichlorosilanes and boron halides, either with or without adding methyl iodide for the control of molar masses of the condensation products. Most of the polymers obtained are solid, and soluble in hydrocarbons. Even though the Wurtz reaction is not specific, the IR spectra of the polymer clearly indicate that Si—B bonds have formed preferentially, but do not provide any evidence for the presence of Si—Si or B—B bonds. Based on these results the authors suggest that the backbones generated mainly consist of an alternating sequence of Si and B [55-59]. 

The boronic acid 2 is first converted to an activated species 8 containing a tetravalent boron center by reaction with a base. Halides or triflates (OTf = trilluoromethanesulfonate) are used as coupling partners R-X for the boronic acids. In many cases the rate-limiting step is the oxidative addition. With respect to the leaving group X, the rate decreases in the order ... 

Coatings and monolithic components of h-BN are usually produced by CVD by the reaction of a boron halide with ammonia. MOCVD and plasma-CVD are also used. The reaction of boron trichloride and ammonia is as follows ... 

This reaction is used with different boron halides and manganese carbonyl derivates in 12 at RT to yield B—Mn compounds (Table 1). 

Thallium(III), particularly as the trifluoroacetate salt, is also a reactive electrophilic metallating species, and a variety of synthetic schemes based on arylthallium intermediates have been devised.75 Arylthallium compounds are converted to chlorides or bromides by reaction with the appropriate cupric halide.76 Reaction with potassium iodide gives aryl iodides.77 Fluorides are prepared by successive treatment with potassium fluoride and boron trifluoride.78 Procedures for converting arylthallium compounds to nitriles and phenols have also been described.79... 

---