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1.
Syed Sheik Mansoor Krishnamoorthy Aswin Kuppan Logaiya Prasanna Nithiya Sudhan Saleem Malik 《Research on Chemical Intermediates》2014,40(2):871-885
A convenient approach to the synthesis of 2-amino-4,6-diphenylnicotinonitriles via four-component reaction of aromatic aldehydes, acetophenone derivatives, malononitrile and ammonium acetate is described. The reactions were done in water as solvent using cellulose sulfuric acid as catalyst. This simple protocol offer advantages such as shorter reaction times, simple work-up procedure, excellent yields and catalyst recovery. 相似文献
2.
A compilation of new naturally occurring iridoids and secoiridoids including their glycosides, esters, aglycones, derivatives and dimers reported during mid 2008-2010 is provided with available physical and spectral data: mp, [α](D), UV, IR, circular dichroism (CD), (1)H- and (13)C-NMR as well as natural source with family and references. The important bioactivity of new and known iridoids and secoiridoids reported during this period is also highlighted. 相似文献
3.
A compilation of new naturally occurring iridoid glycosides, iridoid aglycones, iridoid derivatives and bis-iridoids reported during 1994-2005 is provided with available physical and spectral data: mp, [alpha]D, UV, IR, 1H- and 13C-NMR as well as natural source with family and references. 418 compounds with 202 references are cited. 相似文献
4.
Biswanath Dinda Sudhan Debnath Santanu Majumder Noriko Sato Yoshihiro Harigaya 《中国化学快报》2011,22(10):1233-1236
A new iridoid glucoside,10-O-veratroyleranthemoside(1) was isolated from the roots of Wendlandia tinctoria.The structure was established by spectroscopic(including 2D NMR) and chemical methods. 相似文献
5.
Dinda B Debnath S Arima S Sato N Harigaya Y 《Chemical & pharmaceutical bulletin》2006,54(7):1030-1033
Four new iridoid glucosides, 5-dehydro-8-epi-adoxosidic acid, 5-dehydro-8-epi-mussaenoside, 10-O-dihydroferuloyldeacetyldaphylloside, and wendoside, together with one known iridoid glucoside, 8-epi-mussaenoside, beta-D-glucose, D-mannitol and beta-sitosterol have been isolated from the roots of Wendlandia tinctoria. On the basis of chemical and spectral analyses, the structures of new iridoid glucosides have been elucidated. 相似文献
6.
K. Aswin S. Sheik Mansoor K. Logaiya S. P. N. Sudhan V. Saleem Malik H. Ramadoss 《Research on Chemical Intermediates》2014,40(8):2583-2598
Silica-bonded S-sulfonic acid (SBSSA)-catalyzed, facile, one-pot, three-component coupling of 5,5-dimethyl-1,3-cyclohexanedione (dimedone) or 5,5-dimethyl-1,3-cyclohexanedione, aromatic aldehydes, and malononitrile at reflux temperature is described for preparation of 2-amino-5-oxo-5,6,7,8-tetrahydro-4H-chromene derivatives. 2-Amino-3-cyano-6-methyl-4-phenyl-4H-pyran-5-ethylcarboxylate derivatives can also be prepared in good yield under the same experimental conditions by use of ethyl acetoacetate, aldehydes, and malononitrile. The catalyst, silica-bonded S-sulfonic acid, was reused and recycled without any loss of activity or product yield. 相似文献
7.
Syed Sheik Mansoor Krishnamoorthy Aswin Kuppan Logaiya Prasanna Nitiya Sudhan Saleem Malik 《Research on Chemical Intermediates》2014,40(1):357-369
Facile synthesis of some 1,4-dihydropyridine derivatives via Hantzsch reaction of 5,5-dimethyl-1,3-cyclohexanedione (dimedone), 1,3-diphenyl-2-propen-1-one derivatives and ammonium acetate under solvent-free condition in the presence of silica-supported perchloric acid (HClO4–SiO2) is described. The catalyst is easily prepared, stable, reusable and efficient under the reaction conditions. 相似文献
8.
A new iridoid glucoside, 8-O-(E)-caffeoylmussaenosidic acid (1), together with ixoside (2), was isolated from the roots of Wendlandia tinctoria. The structure of the new compound was established on the basis of detailed spectroscopic (2D NMR) and chemical analysis. 相似文献
9.
Bauhinia variegata Linn. (Leguminosae) is commonly known as 'Kachnar' in Hindi. It is distributed almost throught India. Its powdered bark is traditionally used for tonic, astrain, ulcers. It is also useful in skin diseases. The roots are used as antidote to snake poison. The present article deals with the isolation and structural elucidation of a novel flavonol glycoside 5,7,3',4'-tetrahydroxy-3-methoxy-7-O-alpha-L-rhamnopyranosyl(1-->3)-O-beta-galactopyranoside (1) from the roots of Bauhinia Variegata and its structure was identified by spectral analysis and chemical degradations. The novel compound (1) showed anti-inflammatory activity. 相似文献
10.
Naturally occurring new secoiridoids published during 1994-2005 are reviewed with available physical and spectral data: mp, [alpha](D), UV, IR, (1)H- and (13)C-NMR and plant source. The works on biological and pharmacological activity of naturally occurring iridoids and secoiridoids reported during 1998-2005 are also reviewed. Bioactivities like antiallergic, antiarthritis, antibacterial, anticancer, anticoagulant, anticomplement, antifungal, antiinflammatory, antioxidative, antiprotozoal, antispasmodic, antiviral, immunomodulatory, neuroprotective, nerve growth factor potentiating and wound healing activities are highlighted. 相似文献