The invention discloses a method for preparation of alkylated, fluoro alkylated, chloro alkylated and fluorochloro alkylated compounds by a heterogeneous Co-catalysed alkylation or fluoro, chloro and fluorochloro alkylation with alkyl halides, fluoro alkyl halides, chloro alkyl halides or fluorochloro alkyl halides respectively.

Provided is a flux activator containing a halogen compound represented by formula 1 below: ##STR00001## where X.sup.1 and X.sup.2 represent different halogen atoms, R.sup.1 and R.sup.2 are each a group represented by any one of formulas OH, OR.sup.3, OC(O)R.sup.4, and OC(O)NHR.sup.5, R.sup.1 and R.sup.2 optionally represent the same group or different groups, R.sup.3, R.sup.4, and R.sup.5 are each an aromatic hydrocarbon group having 1 to 18 carbon atoms or an aliphatic hydrocarbon group having 1 to 18 carbon atoms, and R.sup.3, R.sup.4, and R.sup.5 optionally represent the same group or different groups.

The invention discloses a method for preparation of alkylated, fluoro alkylated, chloro alkylated and fluorochloro alkylated compounds by a heterogeneous Co-catalysed alkylation or fluoro, chloro and fluorochloro alkylation with alkyl halides, fluoro alkyl halides, chloro alkyl halides or fluorochloro alkyl halides respectively.

The invention discloses a method for preparation of alkylated, fluoro alkylated, chloro alkylated and fluorochloro alkylated compounds by a heterogeneous Co-catalysed alkylation or fluoro, chloro and fluorochloro alkylation with alkyl halides, fluoro alkyl halides, chloro alkyl halides or fluorochloro alkyl halides respectively.

This invention provides polyurethane foams containing a brominated flame retardant. Also provided are formulations and methods for preparing polyurethane foams containing a brominated flame retardant.

This invention provides polyurethane foams containing a brominated flame retardant. Also provided are formulations and methods for preparing polyurethane foams containing a brominated flame retardant.

Intermediates and methods of their use in the synthesis of analogs of halichondrin B are provided.

This invention provides polyurethane foams containing a brominated flame retardant. Also provided are formulations and methods for preparing polyurethane foams containing a brominated flame retardant.

This invention provides polyurethane foams containing a brominated flame retardant. Also provided are formulations and methods for preparing polyurethane foams containing a brominated flame retardant.

This invention provides polyurethane foams containing a brominated flame retardant. Also provided are formulations and methods for preparing polyurethane foams containing a brominated flame retardant.