Abstract:
:Anion-exchange resins modified with metal-porphine (M-Pr) have been investigated to develop a solid catalyst in the oxidative reaction of phenols by O2 in air. Co-Pr, which is easily prepared and separable from the reaction mixture, has been proved to accelerate the oxidative reaction of phenols such as 3,5-di-tertbutyl-4-hydroxyanisole. The resulting main oxidative products were identified to be quinones by using the GC-MS method.
journal_name
Chem Pharm Bull (Tokyo)journal_title
Chemical & pharmaceutical bulletinauthors
Iwado A,Mifune M,Kato J,Oda J,Chikuma M,Motohashi N,Saito Ydoi
10.1248/cpb.48.1831subject
Has Abstractpub_date
2000-11-01 00:00:00pages
1831-2issue
11eissn
0009-2363issn
1347-5223journal_volume
48pub_type
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journal_title:Chemical & pharmaceutical bulletin
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journal_title:Chemical & pharmaceutical bulletin
pub_type: 杂志文章
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更新日期:2009-01-01 00:00:00
abstract::Xanthones and acridones were synthesized from 3,4-difluoronitrobenzene and 2-fluorobenzaldehydes in two or three steps. The key step was nucleophilic aroylation catalyzed by imidazolidenyl carbene. The nucleophilic aroylation of 3,4-difluoronitrobenzene afforded 2,2'-difluoro-4-nitrobenzophenones. The cyclization of t...
journal_title:Chemical & pharmaceutical bulletin
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journal_title:Chemical & pharmaceutical bulletin
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更新日期:2012-01-01 00:00:00
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journal_title:Chemical & pharmaceutical bulletin
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更新日期:2016-01-01 00:00:00
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journal_title:Chemical & pharmaceutical bulletin
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journal_title:Chemical & pharmaceutical bulletin
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journal_title:Chemical & pharmaceutical bulletin
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abstract::It has been indicated that hydrophilic solid powder to which aqueous solution of a novel dehydrocondensing reagent DMT-MM is adsorbed becomes a simple solid-phase dehydrocondensing reagent of low cost. Reaction in a liquid--liquid biphasic system on the surface of a solid phase with a large area was accelerated by sus...
journal_title:Chemical & pharmaceutical bulletin
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journal_title:Chemical & pharmaceutical bulletin
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更新日期:2017-01-01 00:00:00
abstract::Orally disintegrating tablets (ODTs) are useful for improving benefits for patients of various ages. Masking the unpleasant taste of a drug is an important factor in the compliance of patients who take ODTs. We evaluated the taste acceptability effects of various taste-masking methods on bitter famotidine ODTs as a cl...
journal_title:Chemical & pharmaceutical bulletin
pub_type: 杂志文章,随机对照试验
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更新日期:2012-01-01 00:00:00
abstract::Melt pelletization of lactose 450 M was carried out in an 8-l high shear mixer using PEG 3000 as the meltable binder. The pore size and size distribution of the melt pellets were determined using mercury intrusion porosimetry. The pore size distribution of melt pellets was found to be bimodal. With a higher binder con...
journal_title:Chemical & pharmaceutical bulletin
pub_type: 杂志文章
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更新日期:2000-11-01 00:00:00
abstract::Three new natural sesquiterpene coumarins, isofeterin (1), lehmannolol (3), sinkianone (4), and one known compound, lehmannolone (2), were isolated from the roots of Ferula teterrima and Ferula sinkiangensis. Their chemical structures were established on the basis of spectroscopic analysis, including X-ray crystallogr...
journal_title:Chemical & pharmaceutical bulletin
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