[PDF] Top 20 2H Chromen 4(3H) one
Has 10000 "2H Chromen 4(3H) one" found on our website. Below are the top 20 most common "2H Chromen 4(3H) one".
2H Chromen 4(3H) one
... C1 0.0385 (5) 0.0353 (5) 0.0253 (4) −0.0009 (4) 0.0146 (4) −0.0024 (4) C2 0.0348 (5) 0.0262 (4) 0.0318 (5) −0.0008 (4) 0.0147 (4) −0.0051 (4) C3 0.0263 (4) ... See full document
8
Crystal structure of the triethylammonium salt of 3 [(4 hydroxy 3 methoxyphenyl)(4 hydroxy 2 oxo 2H chromen 3 yl)methyl] 2 oxo 2H chromen 4 olate
... structure one is flipped so that the lactone and alcohol moieties face each other, whereas in the present case alcohol faces alcohol and lactone faces lactone), (ii) a contraction ... See full document
12
7,7′ (3,3′ Dibenzyl 3H,3′H 4,4′ bi 1,2,3 triazole 5,5′ diyl)bis(4 methyl 2H chromen 2 one)
... Synthesis of triazole (IV): The alkyne, (III) (1 equiv), and benzyl azide (4–5 equiv) were dissolved in a 1:1 solution of methanol:water (0.03 M alkyne). CuI (0.2 equiv) was then added, followed by triethylamine ... See full document
11
2 Oxo 2H chromen 4 yl 4 methylbenzoate
... constitute one of the major classes of naturally occurring compounds and interest in their chemistry continues unabated because of their usefulness as biologically active ... See full document
12
2 Oxo 2H chromen 4 yl 4 methoxybenzoate
... constitutes one of the major classes of naturally occurring compounds and interest in its chemistry continues unabated because of its usefulness as a biologically active ... See full document
11
2 Oxo 2H chromen 4 yl propionate
... The molecular structure of title compound (and its atomic numbering scheme) is illustrated in Fig. 1. As expected, the coumarin moiety is planar as shown in the recent X-ray diffraction analysis of 4-substituted ... See full document
9
Facile, Stepwise and Diversity Oriented Synthesis of 3 (2 Oxo 2H Chromen 3 yl) 1 Phenyl 1H Pyrazole 4 Carbaldehydes
... Coumarins are a family of naturally occurring lactones and have attracted interest in recent years because of their diverse pharmacological properties [1]. Coumarin derivatives have been reported to possess biological ... See full document
10
Crystal structure of 7 [(2E) 2 benzylidene 3 oxobutoxy] 4 methyl 2H chromen 2 one
... C35 0.0454 (7) 0.0492 (7) 0.0348 (6) 0.0043 (6) −0.0035 (5) −0.0045 (5) C36 0.0536 (9) 0.0573 (9) 0.0480 (8) 0.0108 (7) 0.0037 (7) −0.0078 (6) C37 0.0534 (8) 0.0515 (8) 0.0526 (8) 0.0113 (7) −0.0036 (7) −0.0145 (6) C38 ... See full document
13
4 Hydroxy 3 [(4 hydroxy 2 oxo 2H 3 chromenyl)(3 thienyl)methyl] 2H chromen 2 one
... For the biological activity of 4-hydroxycoumarins, see: Abdelhafez et al. (2010); Huang et al. (2010); Jacquot et al. (2001); Kokil et al. (2010); Siddiqui & Asad (2010); Skulnick et al. (1997); Sullivan et ... See full document
15
Crystal structure of 7 hydroxy 8 [(4 methylpiperazin 1 yl)methyl] 2H chromen 2 one
... A search of the Cambridge Structural Database (CSD, Version 5.37; Groom et al., 2016) gave 1700 and 85 structures containing coumarin and 7-hydroxycoumarin, respectively. Of these structures, the compounds that resemble ... See full document
8
7 Diethylamino 3 {(E) 4 [(E) 2 (pyridin 4 yl)ethenyl]styryl} 2H chromen 2 one
... [1.392 (3) Å]. The coumarin ring, phenyl ring, and pyridine ring were connected by the two C—C double bonds (C6—C7 bond and C14—C15 bond), which make the three rings in good conjugation. In addition, the dihedral angles ... See full document
9
4 Methyl 7 [3 (4 o tolylpiperazin 1 yl)propoxy] 2H chromen 2 one
... Data collection: SMART Bruker, 2000; cell refinement: SAINT Bruker, 2000; data reduction: SAINT; programs used to solve structure: SHELXS97 Sheldrick, 1997; programs used to refine struc[r] ... See full document
8
3 [2 (Triphenylphosphanylidene)acetyl] 2H chromen 2 one
... 0.524 g). The mixture was stirred for 3 hrs at room temperature. The solvent was evaporated and washed with diethyl ether, to obtain a yellow crystalline solid (96% yield, 1.14 g). In the next step ... See full document
9
3 Hydroxymethyl 6,8 dimethoxy 2H chromen 2 one
... contains four independent molecules. In the crystal structure, intermolecular O—H O hydrogen bonds link the molecules into one-dimensional infinite chains. They are arranged in a nearly parallel fashion along the ... See full document
13
Crystal structure of 3 [2 (4 methylphenyl)ethynyl] 2H chromen 2 one
... O1 0.0288 (4) 0.0177 (4) 0.0170 (4) 0.0023 (3) 0.0054 (3) 0.0017 (3) O2 0.0459 (6) 0.0265 (5) 0.0239 (4) 0.0070 (4) 0.0132 (4) 0.0074 (3) C1 0.0237 (6) 0.0236 (6) 0.0164 (5) ... See full document
9
Crystal structure of 4 methyl 7 propoxy 2H chromen 2 one
... The title compound was prepared by SN2 reaction between 7- hydroxy-4-methyl-2H-chromen-2-one and n-propyl bromide. 7-Hydroxy-4-methyl-2H-chromen-2-one (0.4 g, 2.27 ... See full document
9
Coumarins via knoevenagel condensation reaction (KCR) and pechmann condesation reaction
... or 4-(diethylamino)salicylaldehyde with ethyl acetoacetate, 4-(diethylamino)- salicylaldehyde with ethyl butyrylacetate in the presence of dimethylamine as a ...7-hydroxy-4-methylcoumarin, ... See full document
16
4 Bromomethyl 6 tert butyl 2H chromen 2 one
... To a mixture of equimolar quantity of 4-tert-butyl phenol (0.1 mol) and 4-bromoethyl acetoacetate (0.1 mol) was added dropwise Conc. sulfuric acid (30 ml) with constant stirring and maintaining the ... See full document
8
Crystal structure of 4 azidomethyl 6 isopropyl 2H chromen 2 one
... physiological, bacteriostatic and anti- tumour activity (Mustafa et al., 2011) makes these compounds attractive for further backbone derivatization and screening for their therapeutic properties. In view of their ... See full document
8
5,7 Dimethoxy 2H chromen 2 one
... Data collection: CAD-4 EXPRESS (Enraf–Nonius, 1994); cell refinement: CAD-4 EXPRESS; data reduction: XCAD4 (Harms & Wocadlo, 1995); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); ... See full document
5
Related subjects