A method for the synthesis of N-protected 3,6-aminoalkyl-2,5-diketopiperazines is provided. The method includes obtaining a cyclic -N protected active amino ester and adding it to a mixture of an amine catalyst in an organic solvent.

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.

A method for the synthesis of N-protected 3,6-aminoalkyl-2,5-diketopiperazines is provided. The method includes obtaining a cyclic -N protected active amino ester and adding it to a mixture of an amine catalyst in an organic solvent.

A method for the synthesis of N-protected 3,6-aminoalkyl-2,5-diketopiperazines is provided. The method includes obtaining a cyclic -N protected active amino ester and adding it to a mixture of an amine catalyst in an organic solvent.

Methods of selectively forming substituted pyrazines are provided. Methods of the present invention can include receiving a reaction solution including at least one carbon source and at least one nitrogen source, and heating the reaction solution to a reaction temperature and holding the reaction solution at the reaction temperature for a time sufficient to produce a reaction product comprising at least one substituted pyrazine. The carbon source can be selected from the group consisting of hydroxy ketone(s), sugar(s) treated with at least one buffer, and combinations thereof. Tobacco products incorporating substituted pyrazines are also provided.

Embodiments of the present disclosure describe metal-organic framework compositions comprising a pillar characterized by the formula (M.sub.bF.sub.5(O/H.sub.2O)), where M.sub.b is selected from periodic groups IIIA, IIIB, IVB, VB, VIB, and VIII; and a square grid characterized by the formula (M.sub.a(ligand).sub.x), where M.sub.a is selected from periodic groups IB, IIA, IIB, IIIA, IVA, IVB, VIB, VIIB, and VIII, ligand is a polyfunctional organic ligand, and x is 1 or more; wherein the pillaring of the square grid with the pillars forms the metal-organic framework.

Embodiments of the present disclosure describe metal-organic framework compositions comprising a pillar characterized by the formula (M.sub.bF.sub.5(O/H.sub.2O)), where M.sub.b is selected from periodic groups IIIA, IIIB, IVB, VB, VIB, and VIII; and a square grid characterized by the formula (M.sub.a(ligand).sub.x), where M.sub.a is selected from periodic groups IB, IIA, IIB, IIIA, IVA, IVB, VIB, VIIB, and VIII, ligand is a polyfunctional organic ligand, and x is 1 or more; wherein the pillaring of the square grid with the pillars forms the metal-organic framework.

Provided herein are metal organic frameworks having high selectivity and stability in the present of gases and vapors including H2S, H2O, and CO2. Metal organic frameworks can comprise metal nodes and N-donor organic ligands. Further provided are methods of making metal organic frameworks.

Provided herein are metal organic frameworks having high selectivity and stability in the present of gases and vapors including H2S, H2O, and CO2. Metal organic frameworks can comprise metal nodes and N-donor organic ligands. Further provided are methods of making metal organic frameworks.