摘要:

AbstractMontmorillonite clay mineral shows remarkable ion exchange, intercalation and swelling properties. It can act as a good host for large organic molecules. Intercalated coordination compounds can be prepared in the interlayer spaces of montmorillonite structure. Cu(II)‐ and Ni(II)‐ exchanged montmorillonite sorb 8‐hydroxyquinoline (oxine) to form corresponding coordination compounds of the exchanged metal ions. Such compounds have been characterised by means of elemental analysts, infrared spectroscopy, magnetic susceptibility data and X‐ray diffraction. These compound show good thermal st

ISSN:0009-4536    

DOI:10.1002/jccs.199500011

出版商:WILEY‐VCH Verlag    

年代:1995

数据来源: WILEY

摘要:

AbstractMethods for synthesis of two crucial intermediateAandBstarting with 2,4,4‐trimethyl‐2‐cyclo‐hexenone1and 2,3‐dibromofuran9are

ISSN:0009-4536    

DOI:10.1002/jccs.199500012

出版商:WILEY‐VCH Verlag    

年代:1995

数据来源: WILEY

摘要:

AbstractThe chemical constituents of the roots ofZizyphus jujubaMill.var. spinosawere investigated with a combination of Sephadex LH‐20 column, centrifugal partition chromatography and RP‐18 low pressure liquid chromatography. We isolated seven flavonoids‐quercetin (1), (+)‐dihydroquercetin (2), (+)‐dihydrokaempferol (7), quercetin‐3‐0‐β‐glucoside (8), 2‐hydroxynaringenin (11), rutin (12), and quercetin 3‐0‐(2G‐β‐D‐xylopyranosylrutinoside) (13); four catechins‐(‐)‐gallocatechin (3), (‐)‐epigallocatechin (4), (‐)‐catechin (5), and (‐)‐epicatechin (6); and two phenolic carboxylic acids‐p‐hydroxybenzoic acid (9) and protocatechuic acid (10) from the water soluble fraction of the ethanolic ex

ISSN:0009-4536    

DOI:10.1002/jccs.199500013

出版商:WILEY‐VCH Verlag    

年代:1995

数据来源: WILEY

摘要:

AbstractHydroximoyl chlorides3react with acrylonitrile,N‐arylmaleimide and maleic anhydride to give isoxazolines5, pyrrolidino[3,4‐d]isoxazolines8, and furolidino[3,4‐d]isoxazolines9, respectively.3reacted with 2‐aminopyridine, 2‐aminopyrimidine,o‐phenylenediamine ando‐aminothiophenol to yield 3‐ni‐trosoimidazo[1,2‐α]pyridines20, 3‐nitrosopyrimidines22, 3‐naphthoyl‐1,4‐dihydrobenzo‐1,2,4‐triazines24, and 3‐naphthoyl‐4H‐1,3,4‐benzothiadiazine27, respectively. Compound3reacted with benzoylacetonitrile, acetoacetanilide, thiophenol, benzencsulfinic acid in ethanolic sodium ethoxide solution to give the corresponding isoxazoles12–13and oximes16–17, respectively. The structures of these products were confirmed by elemental analyses, spectral data a

ISSN:0009-4536    

DOI:10.1002/jccs.199500014

出版商:WILEY‐VCH Verlag    

年代:1995

数据来源: WILEY

摘要:

AbstractCyclopentylidene ketals of 3‐(D‐erythroand L‐threo‐glycerol‐1‐yl) of l‐phenyl‐2‐pyrazoline‐4,5‐dione‐4‐phenylhydrazone and 1 ‐phenylflavazole were prepared. The location of the ketal ring on the glycerolyl residues was determin

ISSN:0009-4536    

DOI:10.1002/jccs.199500015

出版商:WILEY‐VCH Verlag    

年代:1995

数据来源: WILEY

摘要:

AbstractTriumfetta bartramiaLinn. is a folk medicine used in Taiwan. From this plant we identified β‐sitosterol, friedelin, friedelinol, quercetin, 2,6‐dimethoxy‐1,4‐benzoquinone, and rosmarinic acid. The identification of these compounds was confirmed by spectral methods and comparison with authentic

ISSN:0009-4536    

DOI:10.1002/jccs.199500016

出版商:WILEY‐VCH Verlag    

年代:1995

数据来源: WILEY

摘要:

AbstractA known sterol, 5α,6α‐epoxy‐5α‐crgosta‐8(14),22E‐diene‐3β,7α‐diol (1), and two new sterols, 5α,6α‐epoxy‐3β,8β,14α‐trihydroxy‐5α‐ergost‐22E‐en‐7‐one (2), (3α,5α),(8β,11β)‐diepidioxy‐ergost‐22E‐en‐12‐one (3), were isolated and characterized from dried fruit bodies ofTrametes orientalis. Thei

ISSN:0009-4536    

DOI:10.1002/jccs.199500017

出版商:WILEY‐VCH Verlag    

年代:1995

数据来源: WILEY

摘要:

AbstractCentrifugal partition chromatography, Sephadex LH‐20 and flash chromatography were applied to separate flavonoids and coumarins fromBerchemia formosana. This first chemical investigation led to the isolation of ten compounds. Based on spectral analysis, they were determined to be quercetin (1), rutin (2), (+)‐dihydroquercetin (3), (+)‐dihydrokaempferol (4), naringenin (5), 2‐hydroxy‐naringenin (6), 2‐hydroxy‐naringenin‐7‐O‐β‐glucoside (7), (‐)‐catechin (8), (‐)‐gallocatechin (9) and scopoletin (10). Among these7is a novel natural product and was found to be composed of two inseparable diastereoisomers. The presence of the rare 2‐hydroxyflavanones6and7inB. formosana

ISSN:0009-4536    

DOI:10.1002/jccs.199500018

出版商:WILEY‐VCH Verlag    

年代:1995

数据来源: WILEY

摘要:

AbstractA new benzenoid compound evofolin‐C was isolated from the heartwood ofTetradium glabrifolium (Evodia meliaefolia). The structure was elucidated by spectral analysis. The synthesis of evofolin‐C is descri

ISSN:0009-4536    

DOI:10.1002/jccs.199500019

出版商:WILEY‐VCH Verlag    

年代:1995

数据来源: WILEY