tetrahydropyranylation of alcohols and phenols, acetylation of aldehydes and n-boc protection of amines are efficiently catalyzed by melamine trisulfonic acid (mtsa). all reactions were performed at room temperature in good to high yields.

Applications of zeolite membranes in separation, chemical sensors, and catalytic membrane reactors have led to extensive studies on their fabrication. To date, mainly silicatebased zeolite membranes of the structure types MFI, DDR, LTA, and FAU have been synthesized on different substrates and evaluated for singleor multiple-gas permeation. Routes for the synthesis of zeolite membranes can be b...

Biomimetic aerobic oxidation of primary benzylic amines has been achieved by using a quinone catalyst. Excellent selectivity is observed for primary, unbranched benzylic amines relative to secondary/tertiary amines, branched benzylic amines, and aliphatic amines. The exquisite selectivity for benzylic amines enables oxidative self-sorting within dynamic mixtures of amines and imines to afford h...

Efficient synthetic routes for the preparation of secondary and tertiary 1,2,3-triazoloamide derivatives were developed. A secondary α-1,2,3-triazoloamide library was constructed and expanded by a previously developed solid-phase synthetic route and a tertiary 1,2,3-triazoloamide library was constructed by a parallel solution-phase synthetic route. The synthetic routes rely on amide formation w...

Abstract Biogenic amines are basic nitrogen compounds, which formed due to the decarboxylation of amino acids or/and amination and transformation aldehydes ketones. Histamine is a heterocyclic biogenic amine present in wide range food products, including fish fishery meat their other dairy products beverages. The review summarizes innovative sample preparation methods for extraction histamine f...

Abstract Catalysis by first-row transition metals is of increasing interest in the context scarcity chemical resources. For instance, iron promising due to its abundance, low toxicity and unique electronic features. Here we synthesized quinazoline alkaloids from alkynoic acids functionalized amines presence dibromide pyridine toluene or, alternatively, a solventless reaction system. We studied ...

Nitriles were found to be highly effective alkylating reagents for the selective N-alkylation of amines under catalytic hydrogenation conditions. For the aromatic primary amines, the corresponding secondary amines were selectively obtained under Pd/C-catalyzed hydrogenation conditions. Although the use of electron poor aromatic amines or bulky nitriles showed a lower reactivity toward the reduc...

Trifluoromethylated amines are important building blocks for pharmaceutical research.[1] The CF3 group, because of its strongly electron withdrawing nature, lowers the basicity of the amide bond towards nonspecific proteolysis[2] when these amines are incorporated into peptides, as well as modify the solubility and desolvation properties.[3] In spite of its prime importance in the drugs industr...