Untitled

Reddy, P. Ram; Subrahmanyam, M.; Kumari, V. Durga

doi:10.1023/a:1019054907203

Cited by 9 publications

(4 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Even so, quinoline molecule is the less deactivated because a high resonance stabilization can be achieved, by substituting in position 2, without introducing any positive charge in the nitrogen atom. Previous works showed that the electrophilic substitution of quinoline could be easily performed over H-Y zeolites at 350 • C [45,46]. Furthermore, our previous works with an H-USY zeolite and quinoline [29] demonstrated that the reaction occurred, specially when the amount of available acid sites was low.…”

Section: Identification Of the Constituents Of "Coke" By Gc-ms Couplingmentioning

confidence: 92%

Deactivating effect of coke and basic nitrogen compounds during the methylcyclohexane transformation over H-MFI zeolite

Caeiro

Magnoux

Ayrault

et al. 2006

Chemical Engineering Journal

View full text Add to dashboard Cite

Section: Identification Of the Constituents Of "Coke" By Gc-ms Couplingmentioning

confidence: 92%

Deactivating effect of coke and basic nitrogen compounds during the methylcyclohexane transformation over H-MFI zeolite

Caeiro

Magnoux

Ayrault

et al. 2006

Chemical Engineering Journal

View full text Add to dashboard Cite

“…Similarly, alkylation of quinoline with methanol and 2-propanol under similar reaction conditions gave the corresponding 2-alkylated quinolines in yields up to 40-55%. 237 4-Alkyl, dialkyl and polyalkyl quinolines were the major by-products.…”

Section: Regioselective Alkylation Of Heteroaromaticsmentioning

confidence: 99%

Use of zeolites for greener and more para-selective electrophilic aromatic substitution reactions

Smith

El‐Hiti

2011

Green Chem.

View full text Add to dashboard Cite

Electrophilic aromatic substitution is one of the most important reactions in synthetic organic chemistry. Such reactions are used for the synthesis of important intermediates that can be used as precursors for the production of pharmaceutical, agrochemical and industrial products. However, many commercial processes to produce such materials still rely on technology that was developed many years ago. Such processes commonly lead to mixtures of regioisomers and in recent years several new approaches have been developed to gain control over the regiochemistry of the reactions. Zeolites can act as heterogeneous catalysts, support reagents, entrain by-products, enhance product para-selectivities via shape-selectivity and avoid aqueous work-ups. For example, zeolites can have advantages in para-regioselective nitration, halogenation, alkylation, acylation and methanesulfonylation reactions under modest conditions. Moreover, usually they can be easily removed from reaction mixtures by simple filtration and regenerated by heating and can then be reused several times to give almost the same yield and selectivity as fresh samples. This review surveys the use of zeolites as para-selective catalysts for a whole range of aromatic substitution reactions, based largely on our own work in the area, but set in the wider context of other related work.

show abstract

“…As reported earlier, the HY catalyst modified by rare earth cations such as La showed slightly higher acidity than the unmodified zeolite. [25][26][27] The framework of the modified zeolites was checked by X-ray diffraction and FTIR measurements and crystallinity found to be retained. The surface areas of the modified zeolites were measured by the BET method and values are given in Table 1.…”

Section: Catalyst Characterizationmentioning

confidence: 99%

A single step synthesis of 2-phenylpyridine from acetophenone, ethanol, formaldehyde and ammonia over molecular sieve catalystsIICT Communication No. 4718.

Gopal

Subrahmanyam

2001

Green Chem.

Self Cite

View full text Add to dashboard Cite

Untitled

Cited by 9 publications

References 22 publications

Deactivating effect of coke and basic nitrogen compounds during the methylcyclohexane transformation over H-MFI zeolite

Deactivating effect of coke and basic nitrogen compounds during the methylcyclohexane transformation over H-MFI zeolite

Use of zeolites for greener and more para-selective electrophilic aromatic substitution reactions

A single step synthesis of 2-phenylpyridine from acetophenone, ethanol, formaldehyde and ammonia over molecular sieve catalystsIICT Communication No. 4718.

Contact Info

Product

Resources

About