[PDF] Top 20 Ciencia, naturaleza y vida según Whitehead
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Condensation reactions of phenolic resins IV: self-condensation of 2,4-dihydroxymethylphenol and 2,4,6-trihydroxymethylphenol (2)
... bimolecular reactions occur as the rate-determining step during the self- condensation of THMP with concentrations above ...the self- condensation of THMP differ little from those ... See full document
54
Condensation reactions of phenolic resins III: self-condensations of 2,4-dihydroxymethylphenol and 2,4,6-trihydroxymethylphenol (1)
... These results indicate that unimolecular reaction(s) and bimole- cular reaction(s) take place simultaneously as the rate- determining step in the condensation reacti[r] ... See full document
45
Condensation reactions of phenolic resins VII: catalytic effect of sodium bicarbonate for the condensation of hydroxymethylphenols
... study, 2-hydroxymethylphenol (2-HMP), 4-hydroxymethylphenol (4-HMP), and 2,4,6- trihydroxymethylphenol (THMP) were used as model com- pounds, and the effect of NaHCO 3 on the ... See full document
16
6 Chloro 2 (4 methoxyphenyl) 4 phenylquinoline
... C1 0.0295 (7) 0.0299 (7) 0.0352 (7) 0.0002 (6) 0.0024 (6) −0.0002 (6) C2 0.0343 (7) 0.0371 (8) 0.0318 (7) −0.0013 (6) 0.0014 (6) 0.0031 (6) C3 0.0314 (7) 0.0324 (7) 0.0337 (7) ... See full document
27
6 (4 Aminophenyl) 2 methoxy 4 phenylnicotinonitrile
... (Fig. 2), molecules are linked by intermolecular N—H···N hydrogen bonds (Table 1) forming screw ...- 2) plane ...between 4-aminophenyl rings of the adjacent sheets with Cg 1 ···Cg 1 iii, iv ... See full document
91
6,10,16,19 Tetraoxatrispiro[4 2 2 4 2 2]nonadecane
... C3 0.052 (2) 0.053 (2) 0.0460 (17) −0.0121 (17) 0.0100 (15) −0.0008 (16) C4 0.057 (2) 0.052 (2) 0.061 (2) 0.0252 (18) −0.0165 (17) −0.0025 (17) C5 0.0338 (14) 0.0256 (15) 0.0413 (15) ... See full document
113
Tris(2 methyl 2 phenylpropyl)(4 nitrophenolato)tin(IV)
... The condensation reaction of tris(2-methyl-2-phenylprop- yl)tin oxide (fenbutatin oxide) (Zimmer et al., 1966), an industrial miticide, with phenols has been little reported in the literature. One ... See full document
95
(4 Formyl 2 methoxyphenolato)tris(2 methyl 2 phenylpropyl)tin(IV)
... C26 0.063 (3) 0.075 (3) 0.063 (3) 0.007 (3) −0.005 (2) −0.004 (3) C27 0.074 (4) 0.094 (4) 0.089 (4) −0.011 (3) −0.020 (3) 0.015 (4) C28 0.135 (6) 0.080 (4) 0.076 ... See full document
114
4′ (4 Methoxyphenyl) 2,2′:6′,2′′ terpyridine
... O1 0.0212 (3) 0.0328 (5) 0.0219 (3) −0.0021 (3) −0.0056 (3) 0.0047 (3) N1 0.0181 (3) 0.0226 (5) 0.0184 (4) −0.0014 (3) 0.0006 (3) −0.0032 (3) N2 0.0289 (4) 0.0271 (5) 0.0212 (4) −0.0090 (4) ... See full document
203
2 {2 [4 (4 Fluorophenyl)piperazin 1 yl] 2 oxoethyl} 6 (morpholin 4 yl) 4 phenylpyridazin 3(2H) one
... (N1/N2/C7–C10) makes dihedral angles of 28.03 (7) and 77.46 (7) ° with the C1–C6 phenyl and C21–C26 benzene rings, respectively. The phenyl and benzene rings make a dihedral angle of 50.17 (8) ° with each other. In the ... See full document
43
Synthesis and Bioevaluation of 4-[(2/4-Chloro-/2, 3-Dichloro-/2/4-Bromo-/2, 4-Dinitro-/4-Nitrophenyl) Anilinomethyl]-6-T-Butyl-2h-1-Benzopyran-2-Ones.
... compounds 4-[(2-chlorophenyl) anilinomethyl]-6-t-butyl-2H-1-benzopyran-2-one (11) and 4-[(4-chlorophenyl) anilinomethyl]-6- t-butyl-2H-1-benzopyran-2-one (12) ... See full document
8
6 (4 Aminophenyl) 4 (4 ethoxyphenyl) 2 methoxynicotinonitrile
... C10 0.0586 (9) 0.0466 (8) 0.0468 (8) −0.0045 (7) −0.0156 (7) 0.0023 (6) C11 0.0651 (10) 0.0436 (8) 0.0516 (9) 0.0004 (7) −0.0162 (8) 0.0048 (7) C12 0.0505 (8) 0.0499 (8) 0.0442 (8) 0.0006 (7) −0.0123 (7) −0.0004 ... See full document
261
4′ [2 (Trifluoromethyl)phenyl] 2,2′:6′,2′′ terpyridine
... the 4′-substituted and the terpyridyl moiety of ...the 4′-position of the terpy moiety in molecules such as the free 4′-phenyl-terpyridine ...and 4′-(4-anilino)-terpyridine ...the ... See full document
19
Synthesis, Characterization and Crystal Structure of a New Schiff Base Ligand from a Bis(Thiazoline) Template and Hydrolytic Cleavage of the Imine Bond Induced by a Co(II) Cation
... that the characteristic bond of the Schiff bases, C=N, has reversible nature which allows by hydrolysis, obtaining the initial corresponding aldehyde and amine compounds [48] [49]. It seems that the presence of the metal ... See full document
658
Synthesis and antibacterial activity of 2-phenyl-3,5-diphenyl (substituted) -6-aryl-3,3a,5,6-tetrahydro-2h-pyrazolo[3,4-d]thiazoles
... synthesized by heating under reflux an equimolar (0.001 mol) of compound (3) and phenylhydrazine with anhydrous sodium acetate (0.082 g) in glacial acetic acid (20 ml) for 6 h and cooled to room temperature. The ... See full document
9
4 (4 Bromophenyl) 6 (4 chlorophenyl)pyrimidin 2 ylamine
... C12 0.0262 (19) 0.0240 (18) 0.0267 (18) 0.0029 (15) 0.0169 (17) 0.0010 (15) C13 0.0237 (18) 0.0240 (19) 0.0229 (17) 0.0021 (15) 0.0112 (16) −0.0009 (15) C14 0.032 (2) 0.0217 (17) 0.0219 (17) 0.0064 (15) 0.0171 ... See full document
27
Diethyl (2′R,4R,4′R) 2 (4′ ethoxycarbonyl 2′ thiazolidinyl) 6 methyl 4 (2′' thienyl) 1,4 dihydropyridine 3,5 dicarboxylate
... C24 0.098 (16) 0.038 (7) 0.15 (2) −0.026 (7) −0.037 (12) 0.041 (9) C35 0.21 (2) 0.058 (13) 0.130 (16) 0.043 (12) 0.031 (12) −0.028 (11) C34 0.072 (11) 0.167 (19) 0.100 (15) 0.028 (11) −0.016 (9) −0.008 (12) ... See full document
147
Synthesis of 2-amino-4-(21-nitro)phenyl-6(211, 211- dimethyl, 711-hydroxy chroman) pyrimidine and study of their antimicrobial activity
... on condensation with 2-nitro benzaldehyde in the presence of 30% alcoholic alkali at room temperature resulted the formatin of chalcone (IV) in good yield (85%); crystallized from hexane / EtoAc as ... See full document
8
Synthesis of some new 2 amino 3 cyano 4 aryl 6 (1 napthyl amino) pyridines as antibacterial agents
... An equimolar mixture of 1-(1-napthyl amino)-3-aryl-2-propen-1-one (1 Mmol), malononitrile (1 Mmol) and ammonium acetate (1.5 Mmol) taken in methanol was heated under reflux for 5 hr. The progress of the reaction ... See full document
7
Synthesis and biological activity of 4” substituted 2 (4' formyl 3' phenylpyrazole) 4 phenyl thiazole
... of 4"methyl-2-(4'-formyl-3'-phenylpyrazole) 4-phenyl thiazole (IIb): 4-methyl-2-hydrazino-4- phenylthiazole (Ib) and acetophenone in ethanol was refluxed in the ... See full document
19
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