Propyl group, 753 table

Table 30 Synthesis of compounds T8[(CH2)3R]8 containing a substituted propyl group... 

SANEX 3 used the 2,6-Z) -(5,6-dialkyl-1,2,4-triazine-3-yl)pyridine family of extraetants eontaining the propyl group, whieh are able to selectively extract trivalent actinides from Imoldm EINO3 [53,78]. The extractant was 0.04mol dm in a mixture of 70%/30% TPH/octanol. A flow sheet based on this solvent has been tried and is shown schematically in Fig. 12.21 the results are given in Table 12.13. The feed was an... 

Derivatives with a C-5 ethyl or propyl group (8 and 12) are particularly potent and these substituents can partly compensate for the lack of a phenolic hydroxyl function, normally a prerequisite for high activity (Table 5.2. cf. Nos. 3, 4 and 17). When R in metazocine (a- (X), R = R = R = Me) is replaced by hydrogen. 

Table VI. Recently, 1-propyl and 2-propyl groups on Pt(lll), obtained by the decomposition of the adsorbed iodides, have been studied in the vCH3/ CH2 region using sum-frequency generation (SFG) (202a) (see Section IX for a description of this technique).

A further example of a cooperative catalytic system is a bifunctionalized mesoporous silica nanosphere material (MSN) containing the ureidopropyl group (UDP) and 3-[2-(2-aminoethylamino)ethylamino]propyl group (AEP). All catalysts were synthesized by a sol-gel procedure similar to the previously mentioned one by using different AEP/UDP molar ratios. The MSN-AEP/ UDP catalyst was employed for the aldol, Henry and cyanosilylation reactions (Scheme 3.8 R = NO2, R" = H, Schemes 3.35 and 3.36, respectively) and TON values were compared with those observed by using MSN-AEP and MSN-UDP catalysts (Table 3.10). 

The Tf results obtained on the polysiloxane-immobilized thiol and chloro-propyl systems (Table 25.4) show that the C-detected T values obtained for the CH2 peak of the ethoxy group at 60.8 ppm, the CH3 peak of the methoxy group at 51.9 ppm, the C(2), C(3) peak of the 3-mercaptopropyl group at 28.7 ppm and the C(l) peak of the 3-mercaptopropyl group at... 

Steric factors also play a role. Bulky groups on either R, or R2 decrease the decomposition rate. For example, when an iso-propyl group is substituted for an n-propyl group on R2, the decomposition is five times slower (Table 1). 

Replacement of the N,N-di-n-propyl groups of 8-OH-DPAT or 8-MeO-DPAT by smaller or larger di-n-alkyl substituents results in a significant drop in affinity [10]. The rankorder of potency is di-n-propyl > di-n-ethyl > di-n-butyl > di-n-methyl (Table 1). For the smaller di-n-alkyl substituted analogues (Cj-Cg), the (R)-enantiomers are more potent than the (S)-enantiomers. This stereo selectivity however, is reversed if larger di-n-alkyl substituents are introduced. The (S)-enantiomer of the di-n-butyl compound is about two times more potent than the (R)-enantiomer (Table 1). 

Without loss in 5-HTlx affinity one of the propyl groups can be replaced by a variety of large substituents such as glutarimidebutyl [29,31] (Table 4). In functional tests most of the (R)-enantiomers behave as fhll agonists, whereas the corresponding (S)-enantiomers are partial agonists. 

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