Amines, photochemistry group

The effect of an a-silyl group attached to tertiary amine on 2-cyclohexenone photochemistry has been clarified by Mariano s group42,43, who illustrates the importance of... 

There are a number of reports in the literature on the photochemistry of amides, including the photodegradation of serum albumin,224 and of polypeptides.1 Photodegradation involves reactions of acyl and imine free radicals generated by photolytic scission of the amide group.23 33 The photooxidation of N-pentylhexanamide led to the formation of n-valeraldehyde and valeric acid from the amine part of the molecule... 

The photochemistry of Eosin under both reductive and oxidative conditions has been studied by several groups [145-151], Photoreduction by amines such as tribenzylamine (R = CH2, R" = ) produces two leuco analogues, the dihydro derivative, and the cross-coupled product formed from the amine radical and the dye radical anion (2) [152], In addition, debromination of Eosin is reported during photobleaching with amines and phenols. The reader however is referred to the extensive studies of Rose Bengal dehalogenation by Paczkowski and Neckers [153]. Radiolysis of Eosin in methanol shows that debromination is a consequence of the photochemical decomposition of semireduced Eosin [154],... 

Aromatic amine oxides have a iarge photochemicai iiterature and a major reaction of this functionality is transfer of the oxygen from nitrogen to a ring position. The -oxlde Iiterature includes many contributions from Albini s group and this year they have reported the results of a study of the photochemistry of simple substituted pyridine N-oxIdes. The products formed from pyridine... 

Topics which have formed the subjects of reviews this year include excited state chemistry within zeolites, photoredox reactions in organic synthesis, selectivity control in one-electron reduction, the photochemistry of fullerenes, photochemical P-450 oxygenation of cyclohexene with water sensitized by dihydroxy-coordinated (tetraphenylporphyrinato)antimony(V) hexafluorophosphate, bio-mimetic radical polycyclisations of isoprenoid polyalkenes initiated by photo-induced electron transfer, photoinduced electron transfer involving C o/CjoJ comparisons between the photoinduced electron transfer reactions of 50 and aromatic carbonyl compounds, recent advances in the chemistry of pyrrolidino-fullerenes, ° photoinduced electron transfer in donor-linked fullerenes," supra-molecular model systems,and within dendrimer architecture,photoinduced electron transfer reactions of homoquinones, amines, and azo compounds, photoinduced reactions of five-membered monoheterocyclic compounds of the indigo group, photochemical and polymerisation reactions in solid Qo, photo- and redox-active [2]rotaxanes and [2]catenanes, ° reactions of sulfides and sulfenic acid derivatives with 02( Ag), photoprocesses of sulfoxides and related compounds, semiconductor photocatalysts,chemical fixation and photoreduction of carbon dioxide by metal phthalocyanines, and multiporphyrins as photosynthetic models. 

Whereas studies on the environmental photochemistry of the majority of pesticides have been conducted extensively, few data exist for PPCPs. Pharmaceuticals are mainly polar compounds containing acidic or basic functional groups (such as carboxylic acids, phenols, and amines) that may be subject to direct and indirect photolysis. Although microbial degradation in waters and soil has been reported for pesticides, less work is reported for PPCPs. The result of such processes can be a complex mixture of reactive intermediates and TPs. Their identification represents a more challenging task than the identification of transformation products stemming from microbial transformation, for which at least some common mechanisms are well established. Therefore, the application of advanced instrumental techniques is of crucial importance. 

Rudienium(Ill) complexes were observed to be sensitive to base hydrolysis as early as 1964. However the difficulties associated with the preparation of suitable complexes and the other attractions of Ru(III) amine chemistry (photochemistry, redox reactions, dinitrogen complexes etc.) tended to divert attention from any systematic study of the base hydrolysis reactions. The most important features that have emerged from the work carried out. Table 3.10, is that substitution invariably takes place with complete retention of configuration and the presence of an amine group tram to the leaving group generates... 

Out of the originally planned contents, three chapters failed to materialize. These should have been chapters on the Photochemistry of the Amino Group , on the Syntheses and Uses of Isotopically Labelled Amines and on Enamines . 

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