• Journal of the Korean Applied Science and Technology
• /
• v.19 no.2
• /
• pp.123-130
• /
• 2002

[Ga]-MFI and H-ZSM-5 catalysts were synthesized under atmospheric pressure and used in the propylene aromatization. The effect of temperature on the product distribution was also investigated. The catalytic activities of the prepared catalysts were compared with the commercialized H-ZSM-5 which was converted from $NH_{4}$-ZSM-5. In the propylene aromatization, product distribution does not depend on the ratio of Si/$Ga_{2}$ with [Ga]-MFI catalyst, but depend on the ratio of Si/$Al_{2}$ with H-ZSM-5 catalyst [Ga]-MFI catalyst shows better dehydrogenation and alkylation activities than H-ZSM-5 catalyst The addition of Ga to H-ZSM-5 catalyst increases the conversion of propylene, selectivity to aromatics, and alkylation. In the propylene aromatization, the selectivity to aromatics slightly increased with increasing temperature with [Ga]-MFI catalyst, while slightly decreased with increasing temperature with H-ZSM-5 catalyst.

• Bulletin of the Korean Chemical Society
• /
• v.23 no.11
• /
• pp.1505-1506
• /
• 2002

• Bulletin of the Korean Chemical Society
• /
• v.31 no.8
• /
• pp.2299-2303
• /
• 2010

A new approach to the use of potassium peroxodisulphate as an oxidizing reagent is proposed and applied to the case of oxidative aromatization of 1, 4-dihydropyridines with cetyltrimethylammonium peroxodisulfate, a phase transfer oxidant. We demonstrate how it is possible to increase the reactivity of potassium peroxodisulphate in the presence of phase transfer catalyst. Dealkylation in case of 4-n-alkyl/n-alkenyl was not obtained.

• Bulletin of the Korean Chemical Society
• /
• v.25 no.1
• /
• pp.19-20
• /
• 2004

• Bulletin of the Korean Chemical Society
• /
• v.25 no.2
• /
• pp.328-330
• /
• 2004

• Bulletin of the Korean Chemical Society
• /
• v.24 no.8
• /
• pp.1057-1058
• /
• 2003

• Bulletin of the Korean Chemical Society
• /
• v.7 no.4
• /
• pp.311-314
• /
• 1986

A series of tetramethyl 1-substituted benzyl-3a,7a-dihydro-1H-indole-2,3,3a,4-tetracarboxylates were prepared and their reactions with bromine were examined. The initial reaction seemed to be the formation of the intermediate N-bromo quaternary ammonium bromide. This intermediate underwent aromatization with loss of the 3a-methoxycarbonyl group. Bromine replaced the N-substituent of the p-methoxybenzyl compound and addition of bromine occurred across the $C_6-C_7$ double bond of the indole ring. Bromination of the benzyl ring and aromatization occurred for the m-methoxybenzyl compound.

• Journal of the Korean Applied Science and Technology
• /
• v.17 no.2
• /
• pp.139-143
• /
• 2000

There appeared enhancements of the conversion of methane by adding a small amount of CO in the aromatization reaction of methane using the Mo-zeolite catalyst. In case of adding $CO_{2}$, $CO_{2}$ changed to CO first, and then the conversion reaction occurred. It was observed by using isotopes as reactants that CO is related to the aromatization reaction of methane.

• Bulletin of the Korean Chemical Society
• /
• v.32 no.12
• /
• pp.4366-4370
• /
• 2011

A simple, green and cost-effective protocol was used for the aromatization of 1,3,5-trisubstituted-2-pyrazolines to the corresponding pyrazoles by in situ generation of iodine ($I^+$) from $H_2O_2$/AcOH or SSA or oxalic acid /KI or NaI system under thermal condition with moderate to good yields.

• Bulletin of the Korean Chemical Society
• /
• v.28 no.2
• /
• pp.336-338
• /
• 2007