Amine effect

The dichotomy of amine effects in aromatic nucleophilic substitution... 

Weatherhead et al. 100) have shown that PEI, benzylated to the extent of 10% of the amines, effectively cleaves Elman s reagent, as shown in reaction (14). Evidence for a binding step and a rate enhancement of 10 were re-... 

Amides seem to behave differently, with complex metal hydride reduction giving an amine, effectively converting the carbonyl group to a methylene (see Section 7.11). 

Chen, H. P., and Marsh, E. N. G., 1997, How enzymes control the reactivity of adenosylcobal-amin effect on coenzyme binding and catalysis of mutations in the conserved histidine-aspartate pair of glutamate mutase. Biochemistry 36 788497889. 

Nishinaga further demonstrated that Con(salpr) [salpr = bis(3-salicylidineamino-propyl)amine] effected the oxygenation of 4-aryl-2,6-di-tert-butylphenols to yield a-ketohydroperoxycobalt(III) complexes 66Sh The free hydroperoxides were obtained by treatment with silica gel. These hydroperoxides are analogous to the peroxide intermediate proposed in the dioxygenase mechanism 33K... 

The amine effectively inhibits polymerization of conjugated dienes. Thus in a procedure for the preparation of rra f-l-phenyl-1,3-butadiene from cinnaraaldehyde and methylmagnesium bromide, acidification, and extraction with ether, small... 

However, aromatic amine hydrochlorides and weakly basic aromatic amines effect selective reactions at the a-carbon atom to give derivatives of the type CCl3C(=NAr)N=PCl3. Products of closely related structure were also obtained on reaction with AW-dichloro-amines ... 

Another enantiopure amine 2.4 (X = CHa. R = C CHPhNHO CK OCH -NMe2) has been introduced by Koga and Yasukata [993]. This amine effects the enantioselective protonation of achiral lithium enolates prepared from racemic 2-alkyl- 1-tetralone trimethylsilylethers by the action of MeLi-LiBr in toluene. In the absence ofLiBr, no asymmetric induction is observed (Figure 4.6). 

Due to the free-radical character of both the y-radiation induced transformation and oxidation in the post-irradiation phase, free-radical scavenging stabilizers - phenols and amines - effectively protect PO [11,226,227]. This was confirmed by excellent antioxidant/antiradiant effects of DP A, PNA and PD in particular in the post-y-irradiation phase of PO and elastomers [11]. Oligomeric DHQ 21 or its combination with 9b efficiently stabilized EPDM or X-LPE used as insulation materials for electric cables exposed to irradiation doses up to 2MGy at a dose rate 300 Gy h 1 [242]. 

Under hydroformylation conditions, amines effect hydroaminomethylation to alkenes in an anti-Markovnikov sense. ... 

Nonproprietary Name (trade name) Dose and Dosage Forms Amine Effects Side Effects ... 

Shiino D, Kubo A, Murata Y, Koyama Y, Kataoka K, Kikuchi A, Sakurai Y, Okano T. Amine effect on phenylboronic acid complex with glucose under physiological pH in aqueous solution. J Biomater Sci Polym Ed 1996 7(8) 697-705. 

OuANN, C., and T. Wilson Quenching of Singlet Oxygen by Tertiary Aliphatic Amines. Effect of DABCO. J. Am. Chem. Soc. 90, 6527 (1968). 

Fig. 22. Pu(IV) extraction by 0.1 M amines effect of nitric acid and sodltim nitrate concentrations. 

BNPD [11, 17.14.] Bacteria High pH, Ammonia Amines Effective against SRB Formaldehyde releaser. Disrupts protein synthesis... 

Polystyrene supports modified with the similar triazine-based dendrons were used by Marsh et al. as insoluble scavengers for removal of excess nucleophilic or electrophilic reagents from the reaction mixtures. Dendrons, decorated with tertiary amines, effectively removed electrophiles (protons), whereas the similar resin with chlorotriazine terminal groups sequestered the excess nucleophiles (amines). 

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