Two new norditerpenoid alkaloids, spicatine A (1) and spicatine B (2) were isolated from the root of Aconitum spicatum. The new compounds were deduced on the basis of their spectral data (IR, HREIMS, EIMS, 1D, 2D-NMR)...Two new norditerpenoid alkaloids, spicatine A (1) and spicatine B (2) were isolated from the root of Aconitum spicatum. The new compounds were deduced on the basis of their spectral data (IR, HREIMS, EIMS, 1D, 2D-NMR). This is the first whole report on the isolation of diterpenoid alkaloids from the A.spicatum Stapf.展开更多
Two new diaryheptanoids, (5S)-5-acetoxy-1,7-bis(4-hydroxy-3-methoxyphenyl)-3- heptanone (1) and (3S,5S)-3,5-diacetoxy-1,7-bis(4-hydroxy-3-methoxyphenyl)heptane (2) were isolated from the rhizomes of Zingiber officinal...Two new diaryheptanoids, (5S)-5-acetoxy-1,7-bis(4-hydroxy-3-methoxyphenyl)-3- heptanone (1) and (3S,5S)-3,5-diacetoxy-1,7-bis(4-hydroxy-3-methoxyphenyl)heptane (2) were isolated from the rhizomes of Zingiber officinale. Their structures were elucidated by spectral methods.展开更多
A new steroid named as Zhonghualiaoine I (1) was isolated from Polygonum nodosum Pers (Chinese name 揨honghualiao? Berberidaceae). Its structure was deduced on the basis of its spectral data.
An inclusion complex of b-cyclodextrin with andrographolide (Andro) was prepared by using a convenient method of microwave irradiation. The structure of the inclusion complex was determined by the 1H NMR, 2D NMR spect...An inclusion complex of b-cyclodextrin with andrographolide (Andro) was prepared by using a convenient method of microwave irradiation. The structure of the inclusion complex was determined by the 1H NMR, 2D NMR spectroscopy as well as the elemental analysis.展开更多
Two new ionone derivatives, rhododendrone A and rhododendronside, have been isolated from the alcoholic extract of the aerial parts of Rhododendron Przewalskii Maxim . The structures of the two compounds, (3R,6S) -3-h...Two new ionone derivatives, rhododendrone A and rhododendronside, have been isolated from the alcoholic extract of the aerial parts of Rhododendron Przewalskii Maxim . The structures of the two compounds, (3R,6S) -3-hydroxy- α -ionone 1 and 1,1,5-trimethyl-6-(3-hydroxyl)cyclohexene-5-yl-1- β-D -pyranoglucoside 2, have been elucidated on the basis of the spectroscopic analyses.展开更多
A new oleanane-type triterpene was isolated from the roots of Doellingeria scaber. Its structure was identified as 3-oxo-16a-hydroxy-olean-12-en-28-oic acid based on 1D and 2D NMR spectroscopy and X-ray analysis.
A new stigmasterol 3, 7, 22-trihydoxystigmast-5-ene (1) and a new eremophilen- olide 8-methoxy-6-angeloyloxyeremophil-7(11)-en-8, 12-olide-14-oic acid (2) were isolated from Ligularia dolichobotrys Diels. Their struct...A new stigmasterol 3, 7, 22-trihydoxystigmast-5-ene (1) and a new eremophilen- olide 8-methoxy-6-angeloyloxyeremophil-7(11)-en-8, 12-olide-14-oic acid (2) were isolated from Ligularia dolichobotrys Diels. Their structures were deduced on the basis of spectral data.展开更多
Two new acetylenic compounds were isolated from the roots of Asparagus gobicus. Their structures were elucidated by spectroscopic methods including 2D NMR techniques.
Photochemically promoted Diels-Alder reactions of 1, 4-diaryl-1-azabutadienes with 2,3-dihydrofuran were achieved by using 2, 4, 6-triphenylpyrylium tetrafluoroborate as catalyst to produce corresponding styrylfuroqui...Photochemically promoted Diels-Alder reactions of 1, 4-diaryl-1-azabutadienes with 2,3-dihydrofuran were achieved by using 2, 4, 6-triphenylpyrylium tetrafluoroborate as catalyst to produce corresponding styrylfuroquinolines in high yield.展开更多
Two new ionone derivatives, named rhododendrone and rhododendronside, were isolated from the alcoholic extract of the aerial parts of Rhododendron przwalskii Maxim. Their structures were elucidated on the basis of spe...Two new ionone derivatives, named rhododendrone and rhododendronside, were isolated from the alcoholic extract of the aerial parts of Rhododendron przwalskii Maxim. Their structures were elucidated on the basis of spectroscopic展开更多
Two new dihydroagarofuran sesquiterpenes with a novel substitution pattern: 1-(-methyl)-butanoyl-2, 15-diacetoxy-4-hydroxy-9-(-)furancarboxy--dihydroagarofuran (1) and 1, 2-di-(-methyl)-butanoyl-4-hydroxy-9-(-)furanca...Two new dihydroagarofuran sesquiterpenes with a novel substitution pattern: 1-(-methyl)-butanoyl-2, 15-diacetoxy-4-hydroxy-9-(-)furancarboxy--dihydroagarofuran (1) and 1, 2-di-(-methyl)-butanoyl-4-hydroxy-9-(-)furancarboxy-15-acetoxy--dihydroagaro- furan (2) were isolated from Euonymus nanoides. Their structures were elucidated by means of 1H and 13C NMR spectroscopic studies, including 2D NMR technique.展开更多
Facile synthesis of 16-hydroxygeranylgeranio 1, a naturally occurring alicyclic diterpene, by alkylation reaction of allylic iodide 3 with phenyl sulfone 4, is described.
Two new isoquinoline alkaloids: carcrisine A and B, have been isolated from the whole plant of Carduus crispus L.. Their structures were elucidated by chemical and spectroscopic methods.
Two new ent-kaurenoids, 19-acetyl-ent-3β, 17-dihydroxykaur-15-ene (1), 19-acetyl-ent- 3β-hydroxykaur-15-en-17-al (2) were isolated from Cacalia pilgeriana. Their structures were elucidated by spectroscopic methods.
A new furobenzopyranone, named anaphalisol, was isolated from the whole plant of Anaphalis lactea. Its structure was elucidated by spectroscopic methods including 2D NMR techniques.
Novel ferrocenyl derivatives of p-(10-mercaptodecyloxy) benzal 4-ferrocenylaniline have been prepared and characterized by element analysis, 1HNMR, and FAB-MS. Cyclic voltammetry has been used to characterize the self...Novel ferrocenyl derivatives of p-(10-mercaptodecyloxy) benzal 4-ferrocenylaniline have been prepared and characterized by element analysis, 1HNMR, and FAB-MS. Cyclic voltammetry has been used to characterize the self-assembled monolayers formed from the compounds on the gold electrodes.展开更多
A novel bridged b-CD dimer in which two b-cyclodextrins were linked by a naphthalene at positions 2 and 7 has been synthesized. 1H and 13CNMR measurements showed that a large change in the conformation of the dimer oc...A novel bridged b-CD dimer in which two b-cyclodextrins were linked by a naphthalene at positions 2 and 7 has been synthesized. 1H and 13CNMR measurements showed that a large change in the conformation of the dimer occurred in aqueous solution. The dimer interacted with methyl and ethyl orange to form stable inclusion complexes via 搃nduced fit?mechanism.展开更多
文摘Two new norditerpenoid alkaloids, spicatine A (1) and spicatine B (2) were isolated from the root of Aconitum spicatum. The new compounds were deduced on the basis of their spectral data (IR, HREIMS, EIMS, 1D, 2D-NMR). This is the first whole report on the isolation of diterpenoid alkaloids from the A.spicatum Stapf.
文摘Two new diaryheptanoids, (5S)-5-acetoxy-1,7-bis(4-hydroxy-3-methoxyphenyl)-3- heptanone (1) and (3S,5S)-3,5-diacetoxy-1,7-bis(4-hydroxy-3-methoxyphenyl)heptane (2) were isolated from the rhizomes of Zingiber officinale. Their structures were elucidated by spectral methods.
基金supported by the Northwest Normal University-Bring Forth new Idea Project of Science and Technology P. R. China
文摘A new steroid named as Zhonghualiaoine I (1) was isolated from Polygonum nodosum Pers (Chinese name 揨honghualiao? Berberidaceae). Its structure was deduced on the basis of its spectral data.
文摘An inclusion complex of b-cyclodextrin with andrographolide (Andro) was prepared by using a convenient method of microwave irradiation. The structure of the inclusion complex was determined by the 1H NMR, 2D NMR spectroscopy as well as the elemental analysis.
基金Supported by the National Natural Science Foundation of China( No.2 0 2 75 0 2 0 ) and the Natural Science Foundation ofShandong Province( No.Z2 0 0 2 B0 2 )
文摘Two new ionone derivatives, rhododendrone A and rhododendronside, have been isolated from the alcoholic extract of the aerial parts of Rhododendron Przewalskii Maxim . The structures of the two compounds, (3R,6S) -3-hydroxy- α -ionone 1 and 1,1,5-trimethyl-6-(3-hydroxyl)cyclohexene-5-yl-1- β-D -pyranoglucoside 2, have been elucidated on the basis of the spectroscopic analyses.
文摘A new oleanane-type triterpene was isolated from the roots of Doellingeria scaber. Its structure was identified as 3-oxo-16a-hydroxy-olean-12-en-28-oic acid based on 1D and 2D NMR spectroscopy and X-ray analysis.
文摘A new stigmasterol 3, 7, 22-trihydoxystigmast-5-ene (1) and a new eremophilen- olide 8-methoxy-6-angeloyloxyeremophil-7(11)-en-8, 12-olide-14-oic acid (2) were isolated from Ligularia dolichobotrys Diels. Their structures were deduced on the basis of spectral data.
基金This work was supposed by the National Natural Science Foundation of China(No．29972017)
文摘Two new acetylenic compounds were isolated from the roots of Asparagus gobicus. Their structures were elucidated by spectroscopic methods including 2D NMR techniques.
文摘Photochemically promoted Diels-Alder reactions of 1, 4-diaryl-1-azabutadienes with 2,3-dihydrofuran were achieved by using 2, 4, 6-triphenylpyrylium tetrafluoroborate as catalyst to produce corresponding styrylfuroquinolines in high yield.
文摘Two new ionone derivatives, named rhododendrone and rhododendronside, were isolated from the alcoholic extract of the aerial parts of Rhododendron przwalskii Maxim. Their structures were elucidated on the basis of spectroscopic
文摘Two new dihydroagarofuran sesquiterpenes with a novel substitution pattern: 1-(-methyl)-butanoyl-2, 15-diacetoxy-4-hydroxy-9-(-)furancarboxy--dihydroagarofuran (1) and 1, 2-di-(-methyl)-butanoyl-4-hydroxy-9-(-)furancarboxy-15-acetoxy--dihydroagaro- furan (2) were isolated from Euonymus nanoides. Their structures were elucidated by means of 1H and 13C NMR spectroscopic studies, including 2D NMR technique.
基金This work was financial supported by the National Natural Science Foundation of China (Grant No. 20072012) and the Special Research Grant for Doctoral Sites in Chinese Universities (Grant No. 20010730001).
文摘Facile synthesis of 16-hydroxygeranylgeranio 1, a naturally occurring alicyclic diterpene, by alkylation reaction of allylic iodide 3 with phenyl sulfone 4, is described.
文摘Two new isoquinoline alkaloids: carcrisine A and B, have been isolated from the whole plant of Carduus crispus L.. Their structures were elucidated by chemical and spectroscopic methods.
基金This work was supported by the NNSFC(No．29972017 and No．20021001一QT Program)
文摘Two new ent-kaurenoids, 19-acetyl-ent-3β, 17-dihydroxykaur-15-ene (1), 19-acetyl-ent- 3β-hydroxykaur-15-en-17-al (2) were isolated from Cacalia pilgeriana. Their structures were elucidated by spectroscopic methods.
文摘A new furobenzopyranone, named anaphalisol, was isolated from the whole plant of Anaphalis lactea. Its structure was elucidated by spectroscopic methods including 2D NMR techniques.
文摘Novel ferrocenyl derivatives of p-(10-mercaptodecyloxy) benzal 4-ferrocenylaniline have been prepared and characterized by element analysis, 1HNMR, and FAB-MS. Cyclic voltammetry has been used to characterize the self-assembled monolayers formed from the compounds on the gold electrodes.
文摘A novel bridged b-CD dimer in which two b-cyclodextrins were linked by a naphthalene at positions 2 and 7 has been synthesized. 1H and 13CNMR measurements showed that a large change in the conformation of the dimer occurred in aqueous solution. The dimer interacted with methyl and ethyl orange to form stable inclusion complexes via 搃nduced fit?mechanism.
