Nitrogen containing precursor

In the second, >100 DBFs were identified in indoor chlorinated and brominated pools, including many nitrogenous DBFs (haloamides, halonitriles, haloanilines, haloamines, haloanisoles, and halonitro-compounds), likely due to the nitrogen-containing precursors from swimmers (urine, sweat, etc.) [143]. Trichloramine and THMs were also measured in the pool air [143]. Nitrosamines have been measured in chlorinated pools and hot tubs, up to a maximum of429 ng/L... 

Another all-carbon Diels-Alder reaction is proposed for the biosynthesis of the indole alkaloids tabersonine 1-6 and catharanthine 1-7 of the Aspidosperma and Iboga family [28-31]. The compounds are formed via strictosidine 1-3, the first nitrogen-containing precursor of the monoterpenoid indole alkaloids, and stemmadenine 1-4, which is cleaved to give the proposed intermediate dehy-drosecodine 1-5 with an acrylate and a 1,3-butadiene moiety (Scheme 1-1). 

The oxidation of chars prepared from nitrogen-containing precursors has been investigated. Chars produced from the nitrogen-containing compounds acridine and phenanthridine were oxidized at atmospheric pressure at temperatures of 773-873 K. The relative rates of nitrogen and carbon release and the formation of NO have been determined in relation to char nitrogen content and precursor type. 

Cote, R., G. Lalande, D. Guay, J.R Dodelet, and G. Denes (1998). Influence of nitrogen-containing precursors on the electrocatalytic activity of heat-treated Fe(OH)2 on carbon black for O2 reduction. Electrochem. Solid State Lett. 145, 2411-2418. 

Schafer demonstrated that ring closure of oxygen and nitrogen-containing precursors provided the corresponding tetrahydrofurans and pyrrolidines in moderate to good yields [21, 22]. The triquinane derivative 39 was also prepared in a similar way [23]. Marko et al. revealed that... 

Polyketides occuring in plants are not always exclusively synthesized from acetate units, but often are of mixed biosynthetic origin. Phenylpropanoid or terpenoid building blocks or sometimes both can be connected with the acetate-derived backbone. In addition, parts of the carbon skeleton can be derived from fatty acids or amino acids. This mixed assembly principle results in a plethora of structurally diverse compounds. Polyketide alkaloids obtained when nitrogen or nitrogen-containing precursors are incorporated into the polyketide backbone will also be discussed. 

It is possible to synthesize imido complexes by cleavage of a N-H or N-Si bond of an amine, upon complexation with an oxide or a metal chloride, by metathesis, by reaction with a nitrile, by electrophilic attack of a nitride or by other reactions of various nitrogen-containing precursors ... 

Tang has reported a reductive phosphinylation approach for the synthesis of a-amino-phosphine oxides (Scheme 4.39) [90]. The nitrogen-containing precursor for this reaction was an amide, while the phosphorus precursor was a secondary phosphine oxide. Amides... 

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