The present specification provides a method for preparing a styrene monomer including preparing a styrene monomer of Chemical Formula 2 by reacting a compound represented by Chemical Formula 1 in the presence of phosphoric acid, wherein the phosphoric acid is used in 100 mol % or greater based on 100 mol % of the compound represented by Chemical Formula 1.

The present specification provides a method for preparing a styrene monomer including preparing a styrene monomer of Chemical Formula 2 by reacting a compound represented by Chemical Formula 1 in the presence of phosphoric acid, wherein the phosphoric acid is used in 100 mol % or greater based on 100 mol % of the compound represented by Chemical Formula 1.

The present specification provides a method for preparing a styrene monomer including preparing a styrene monomer of Chemical Formula 2 by reacting a compound represented by Chemical Formula 1 in the presence of phosphoric acid, wherein the phosphoric acid is used in 100 mol % or greater based on 100 mol % of the compound represented by Chemical Formula 1.

The present specification provides a method for preparing a styrene monomer including preparing a styrene monomer of Chemical Formula 2 by reacting a compound represented by Chemical Formula 1 in the presence of phosphoric acid, wherein the phosphoric acid is used in 100 mol % or greater based on 100 mol % of the compound represented by Chemical Formula 1.

A method for the synthesis of a aryl compound of Formula (1).
UT-WR.sub.1).sub.n (1)

A method for the synthesis of a aryl compound of Formula (1). Formula (1)

UT-WR.sub.1).sub.n (1)

The present application provides, among other things, compounds and methods for metathesis reactions. In some embodiments, the present disclosure provides methods for preparing alkenyl halide with regioselectivity and/or stereoselectivity. In some embodiments, the present disclosure provides methods for preparing alkenyl halide with regioselectivity and Z-selectivity. In some embodiments, the present disclosure provides methods for preparing alkenyl halide with regioselectivity and E-selectivity. In some embodiments, provided technologies are particularly useful for preparing alkenyl fluorides. In some embodiments, a provided compound useful for metathesis reactions has the structure of formula II-a. In some embodiments, a provided compound useful for metathesis reactions has the structure of formula II-b.

The present application provides, among other things, compounds and methods for metathesis reactions. In some embodiments, the present disclosure provides methods for preparing alkenyl halide with regioselectivity and/or stereoselectivity. In some embodiments, the present disclosure provides methods for preparing alkenyl halide with regioselectivity and Z-selectivity. In some embodiments, the present disclosure provides methods for preparing alkenyl halide with regioselectivity and E-selectivity. In some embodiments, provided technologies are particularly useful for preparing alkenyl fluorides. In some embodiments, a provided compound useful for metathesis reactions has the structure of formula II-a. In some embodiments, a provided compound useful for metathesis reactions has the structure of formula II-b.

The present application provides, among other things, compounds and methods for metathesis reactions. In some embodiments, the present disclosure provides methods for preparing alkenyl halide with regioselectivity and/or stereoselectivity. In some embodiments, the present disclosure provides methods for preparing alkenyl halide with regioselectivity and Z-selectivity. In some embodiments, the present disclosure provides methods for preparing alkenyl halide with regioselectivity and E-selectivity. In some embodiments, provided technologies are particularly useful for preparing alkenyl fluorides. In some embodiments, a provided compound useful for metathesis reactions has the structure of formula II-a. In some embodiments, a provided compound useful for metathesis reactions has the structure of formula II-b.

A process of preparing olefins of the formula (I) is described herein: ##STR00001##
with R.sup.1 being a substituted or unsubstituted (C.sub.1-C.sub.30)hydrocarbyl, and R.sup.2 being a substituted or unsubstituted (C.sub.1-C.sub.20)hydrocarbyl. The process includes reacting a compound of formula (II) ##STR00002##
wherein Ar is chosen from ##STR00003##
in the presence of a palladium-based catalyst and an organic solvent. A process of preparing olefins of the formula (III) is also described: ##STR00004##
with R.sup.3 being a substituted or unsubstituted (C.sub.1-C.sub.30)hydrocarbyl, R.sup.4 being a substituted or unsubstituted (C.sub.1-C.sub.20)hydrocarbyl, and R.sup.5 being a substituted or unsubstituted (C.sub.1-C.sub.30) hydrocarbyl. The process includes reacting a compound of formula (IV) ##STR00005##
wherein Ar is chosen from ##STR00006##
with a compound of formula (V) ##STR00007##
wherein Ar is chosen from ##STR00008##
in the presence of a palladium-based catalyst and an organic solvent.