Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Longmei, Zeng"'
Publikováno v:
Synthetic Communications. 34:665-671
A mild Horner–Wadsworth–Emmons reaction is described. Treatment 4‐substituted cyclohexanones with trimethyl 1‐(N‐benzyloxycarbonyl) phosphonoacetate afforded the corresponding α,β‐didehydroamino acid derivatives.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7c607267144953e9cf31637f6bf5ecae
https://doi.org/10.1081/scc-120027714
https://doi.org/10.1081/scc-120027714
Publikováno v:
Steroids. 69:803-808
This paper describes the efficient and stereospecific synthesis of cytotoxic dihydroxylated sterols, 24-methylene-cholest-5-ene-3beta,7alpha-diol 1, and its C-7 epimer, 24-methylene-cholest-5-ene-3beta,7beta-diol 2. The crux of the synthesis is that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::06bb2b04a2fb3bebae3368be0924a5b5
https://doi.org/10.1016/j.steroids.2004.09.010
https://doi.org/10.1016/j.steroids.2004.09.010
Autor:
Kaibei Yu, Longmei Zeng, Danming Za, Robert P. Hammer, Hongtao Mu, Guifa Su, Carlos Cativiela
Publikováno v:
Synthetic Communications. 33:2873-2884
The stereospecific syntheses of trans-2,3-diaryl-1-aminocyclopropanecarboxylic acid derivatives are reported. The key step is a 1,3-dipolar cycloaddition of phenyldiazomethane to (Z)-2-phenyl-4-arylidene-5(4H)-oxazolones, followed by the extrusion of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2119d51b05fe59a26a6313c13075c7ca
https://doi.org/10.1081/scc-120022177
https://doi.org/10.1081/scc-120022177
Autor:
Jingyu Su, Yong-Li Zhong, Tangsheng Peng, Xiong Fu, Yan-Hui Meng, Guiyangsheng Wang, Longmei Zeng, Xiao-Hua Xu, Ye Zhu, Yingzhou Cen, Yaohua Zheng
Publikováno v:
Pure and Applied Chemistry. 71:1147-1151
In search of new pharmaceutically valuable substances from marine organisms, we have been engaged in chemical studies on the constituents of corals, sponges and algae collected in the South China Sea. This paper summarizes some of our research result
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3abea9c19ee8b716a398411d7eac1379
https://doi.org/10.1351/pac199971061147
https://doi.org/10.1351/pac199971061147
Publikováno v:
Journal of Macromolecular Science, Part A. 33:995-1004
The copolymerization products of α-pinene and styrene were prepared with the compound catalyst system SbCl3/AlCl3 by changing the Sb/Al ratio, feeding monomer ratio, solvent, and polymerization temperature. The compositions of the copolymerization p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::33a1d6b3f6fecb8431d3efb9b6623550
https://doi.org/10.1080/10601329608010900
https://doi.org/10.1080/10601329608010900
Autor:
Longmei Zeng, Zhi Guan
Publikováno v:
China Journal of Chinese Matera Medica. 35
Chemical constituents of a new species of Spongia sponge collected from Sanya bay in Hainan province, were analyzed. Nine secondary metabolites 1-9 were isolated. On the basis of their spectroscopic data and chemical degradation, their chemical struc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1a5b781a5c77c1e9bbeb72e290411c2f
https://doi.org/10.4268/cjcmm20100814
https://doi.org/10.4268/cjcmm20100814
Publikováno v:
Journal of Natural Products. 62:644-646
Phyllofolactone C (3) and phyllofolactone D (4), two new minor homoscalarane sesterterpenes, were isolated from the sponge Phyllospongia foliascens collected in the South China Sea. Their structures were assigned by analysis of spectroscopic data.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::70ddbd547f9b15d40e82d7fb32919c3b
https://doi.org/10.1021/np9804841
https://doi.org/10.1021/np9804841
Publikováno v:
Steroids. 69(7)
The cytotoxic, polyhydroxylated sterol 24-methylene-cholesta-3beta,5alpha,6beta,19-tetrol (1), previously isolated from the soft corals Nephthea albida and N. tiexieral verseveldt, was synthesized using stigmasterol as the starting material by 10 ste
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c4cd5c3e9d5ea3ca44411759975a1e13
https://pubmed.ncbi.nlm.nih.gov/15246774
https://pubmed.ncbi.nlm.nih.gov/15246774
Autor:
Kaibei Yu, Robert P. Hammer, Carlos Cativiela, Longmei Zeng, Guifa Su, Hongtao Mu, Danming Za
Publikováno v:
ChemInform. 34
The stereospecific syntheses of trans-2,3-diaryl-1-aminocyclopropanecarboxylic acid derivatives are reported. The key step is a 1,3-dipolar cycloaddition of phenyldiazomethane to (Z)-2-phenyl-4-arylidene-5(4H)-oxazolones, followed by the extrusion of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bd257debfb01a758fa16c18bdbccc4fd
https://doi.org/10.1002/chin.200349099
https://doi.org/10.1002/chin.200349099
Autor:
Zhi Guan, Longmei Zeng
Publikováno v:
Chemistry of Natural Compounds. 46:287-288
Sphingolipids have been isolated from various marine organisms including algae, coelenterates, echinoderms, sponges, and tunicates. They are increasingly becoming important compounds because of their marked biological activity. It has been recently f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c644f09f16302104dccda2211308402e
https://doi.org/10.1007/s10600-010-9590-9
https://doi.org/10.1007/s10600-010-9590-9