4H-pyran
A photodimer of a 4 phenyl 4H pyran
... the 4H-pyran system has not received much attention in the literature to date, we have devoted consider- able effort to investigating its potential activity as an HIV protease ...4-phenyl-4H- ...
9
4 (4 Fluorophenyl) 6 methylamino 5 nitro 2 phenyl 4H pyran 3 carbonitrile
... substituted pyran derivatives, owing to their wide range of biological activities (Lokaj et ...Some 4H-pyran derivatives are potential bioactive compounds and can be used as calcium antagonists ...
9
Synthesis and Evaluation of 2 Amino 4H Pyran 3 Carbonitrile Derivatives as Antitubercular Agents
... 2.2. Evaluation of Antitubercular Activity The antitubercular activity of racemic 2-amino-4H-pyran- 3-carbonitriles 2a-2e, homochiral 2-amino-4H-pyran-3- carbonitriles (S)-2a, (S)-2d, (R)-2a, ...
8
3,5 Bis(4 methylbenzoyl) 2,6 bis(4 methylphenyl) 4H pyran 4 one
... the 4H-pyran-4-one heterocyclic system, also known as 4- or -pyrones, are usually quite stable crys- talline ...1995). 4H-Pyran-4-ones and their various deriv- atives have been the subject of ...
9
4 (4 Methoxyphenyl) 6 methylamino 5 nitro 2 phenyl 4H pyran 3 carbonitrile
... For background to compounds containing the 4H-pyran unit, see: Brahmachari (2010); Hatakeyama et al. (1988). For 2- amino-4H-pyrans as photoactive materials, see: Armetso et al. (1989). For graph-set ...
8
Ethyl 4 (3 hydroxy 6 methyl 4 oxo 4H pyran 2 ylmethyl)piperazine 1 carboxylate
... 2-methyl-5-hydroxy-4H- pyran-4-one (allomaltol) and a piperazine ring, which is connected on one N side to the methylene bridge at the 2-position of the pyranone ring and on the other N side to the ...
8
3 Hydroxy 6 methyl 2 [4 (3 trifluoromethylphenyl)piperazin 1 ylmethyl] 4H pyran 4 one
... Anticonvulsant agents are found in several different chemical classes, such as hydantoins, barbiturates, oxazolid- inediones, succinimides, acylureides, glutarimides, benzodi- azepines, secondary or tertiary alcohols, ...
9
A rapid and efficient route to synthesis of 2-amino-4H-pyran-3-carbonitrile derivatives in the presence of L-proline and their antimicrobial activity
... An efficient and mild method for the synthesis of 2-amino-4H-pyran-3-carbonitriles via coupling reaction of malononitrile and α , α ’Bis(benzylidine) cyclohexanones in the presence of L-proline as a ...
12
Polyethylene glycol-bis (N-methylimidazolium) dihydroxide as an efficient and recyclable basic phase-transfer catalyst for the synthesis of 4H-pyran derivatives in aqueous media
... of benzaldehyde, malononitrile and dimedone to produce the corresponding 4H-pyran 1a with some of the methods reported in the literature is presented in Tables 3. The results showed that our procedure ...
12
Ethyl 6 amino 5 cyano 4 isopropyl 2 methyl 4H pyran 3 carboxylate
... The analysis of the bibliographical data shows that pyrans are biologically interesting compounds (Bloxham et al., 1994; Wang et al., 1996). In fact, some pyran derivatives present antibacterial activities ...
8
Mechanism of the Polymerization of Styrene and 2.3 Dihydro-4H-Pyran Catalyzed by H3PW12O40 Catalyst.
... the 2,3 dihydro-4H-pyran (DHP) and the presence of the band at 1084 cm -1 assigned to the ether bond C-O-C indicate that the propagation process of the copolymerization by using this su[r] ...
7
KF Al2O3 as an Efficient and Recyclable Basic Catalyst for the Synthesis of 4H Pyran 3 carboxylates and 5 Acetyl 4H pyrans
... general, 4H-pyrans are prepared by the one-pot condensation of an aldehyde, malononitrile and ethyl acetoacetate in presence of a ...of 4H-pyrans [9-15] involve the use of hazardous solvents, long reaction ...
5
Synthesis of Spiro[4H pyran 3,3 oxindole] by 1,3 Dibromo 5,5 dimethyl hydantoin(DBDMH) As a Catalyst Using Eco Friendly Medias
... A highly efficient method for the synthesis of unsymmetrical spiro[4H-pyran-3,3-oxindole] is reported by three-component condensation of isatin, malonitrile and dimedone in the presence of catalytic amount ...
5
3,5 Dihydroxy 2 hydroxymethyl 4H pyran 4 one
... Data collection: SMART Bruker, 2000; cell refinement: SAINT Bruker, 2000; data reduction: SAINT and SHELXTL Bruker, 2000; programs used to solve structure: SHELXS97 Sheldrick, 1997; prog[r] ...
7
3,5 Dihydroxy 2 methyl 4H pyran 4 one
... The title compound, 3,5-dihydroxy-2-methyl-pyran-4-one, (I) was identified as a decomposition product in the stored solution of orange juice (Shinoda, et al., 2004). We report here the crystal structure of the ...
6
5 Hydroxy 2 methyl 4H pyran 4 one
... Data collection: APEX2 Bruker, 2007; cell refinement: APEX2; data reduction: SAINT Bruker, 2007; programs used to solve structure: SHELXS97 Sheldrick, 2008; programs used to refine struc[r] ...
6
Diethyl(μ3 2 methyl 4 oxo 4H pyran 3 olato κ4O3,O4:O3:O3)tris(μ2 2 methyl 4 oxo 4H pyran 3 olato κ3O3,O4:O3)trizinc toluene disolvate
... Data collection: CrysAlis CCD Oxford Diffraction, 2007; cell refinement: CrysAlis RED Oxford Diffraction, 2007; data reduction: CrysAlis RED; programs used to solve structure: SHELXS97 S[r] ...
15
Crystal structure of isobutyl 4 (2 chlorophenyl) 5 cyano 6 {(E) [(dimethylamino)methylidene]amino} 2 methyl 4H pyran 3 carboxylate
... Data collection: APEX2 Bruker, 2008; cell refinement: SAINT Bruker, 2008; data reduction: SAINT; programs used to solve structure: SHELXS97 Sheldrick, 2008; programs used to refine struc[r] ...
9
Methyl 6 amino 5 cyano 2 methoxycarbonylmethyl 4 phenyl 4H pyran 3 carboxylate
... The molecular structure of (I) is shown in Fig. 1. The O1Ð C1 and O1ÐC5 bond lengths are 1.387 (2) and 1.363 (2) AÊ, respectively (Table 1). The mean C O bond length of 1.198 (2) AÊ is typical of a double bond, and is ...
8
Ethyl 6 amino 5 cyano 2 methyl 4 phenyl 4H pyran 3 carboxylate
... reaction of phenylmethylidenemalononitrile and ethyl aceto- acetate in the presence of triethylbenzylammonium chloride in an aqueous medium. The pyran ring adopts a boat conformation. The phenyl ring and the basal ...
8