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文章名     作者     期刊名     摘要     卷     期         如果没有找到您所需要的文献，请点击 ——此处申请     共94条记录   CONSTITUENTS AND BIOACTIVITIES OF CLAUSENA EXCAVATA [作者：KONGKATHIP NGAMPONG; KONGKATHIP BOONSONG,期刊：Heterocycles, 页码：121-144 , 文章类型： Review，,卷期：2009年79-1] Clausena excavata Burm. f. (Rutaceae) is a medicinal plant which is used in folklore medicine for treatment of cold, malaria, AIDS, dermatopathy, abdominal pain, and snake-bite. This plant is a rich source of coumarins a... SYNTHESIS OF 1 alpha,25-DIHYDROXY-2 beta-(3-HYDROXYPROPOXY)VITAMIN D-3 (ELDECALCITOL) AND RELATED COMPOUNDS BY THE TROST CONVERGENT METHODOLOGY [作者：KUBODERA NOBORU; HATAKEYAMA SUSUMI,期刊：Heterocycles, 页码：145-162 , 文章类型： Review，,卷期：2009年79-1] Using Trost convergent methodology, the synthesis of 1 alpha,25-dihydroxy-2 beta-(3-hydroxypropoxy)vitamin D-3 (eldecalcitol) for the improved and industrial scale production and related putative metabolites of eldecalci... REACTIONS AND USES OF ARTIFICIAL KETOSES [作者：YAMANOI TAKASHI; MATSUDA SHO,期刊：Heterocycles, 页码：163-194 , 文章类型： Review，,卷期：2009年79-1] Some artificial ketoses having a naturally occurring aldose backbone can be readily prepared by the addition of RLi or RMgX to aldonolactone derivatives. They are expected to be a novel class of carbohydrate reagents for... DISCOVERY OF BATRACHOTOXIN: THE LAUNCH OF THE FROG ALKALOID PROGRAM AT NIH [作者：GARRAFFO H MARTIN; SPANDE THOMAS F,期刊：Heterocycles, 页码：195-205 , 文章类型： Review，,卷期：2009年79-1] The determination of the structures of the batrachotoxins (BTXs), extremely toxic steroidal alkaloids found in the skins of the dart-poison frogs of the genus Phyllobates from Colombia in the 1960s is reviewed. The BTXs ... EPIBATIDINE: FROM FROG ALKALOID TO ANALGESIC CLINICAL CANDIDATES. A TESTIMONIAL TO "TRUE GRIT"! [作者：GARRAFFO H MARTIN; SPANDE THOMAS F; WILLIAMS MICHAEL,期刊：Heterocycles, 页码：207-217 , 文章类型： Review，,卷期：2009年79-1] A routine toxicity test of the alkaloid extract from the Ecuadoran poison frog Epipedobates anthonyi gave a Straub-tail (S-T) response on sub-cutaneous (sc) injection in mice, a phenomenon never seen before from any pois... (-)-INDOLIZIDINE 167B VIA 4-PYRROLYLBUTANALS: TWO SYNTHETIC METHODOLOGIES AT COMPARISON [作者：SETTAMBOLO ROBERTA,期刊：Heterocycles, 页码：219-228 , 文章类型： Review，,卷期：2009年79-1] This review relates the results that we obtained in the field of the total synthesis of (-)-indolizidine 167B, based on the intramolecular cyclodehydration of a 4-pyrrolylbutanal to a 5,6-dihydroindolizine core, accordin... ENANTIOSELECTIVE RADICAL CYCLIZATION FOR THE SYNTHESIS OF CYCLIC COMPOUNDS [作者：YOSHIOKA EITO; KOHTANI SHIGERU; MIYABE HIDETO,期刊：Heterocycles, 页码：229-242 , 文章类型： Review，,卷期：2009年79-1] This review highlights the enantioselective radical cyclization reactions catalyzed by chiral Lewis acid as well as organocatalyst. The results of the radical cyclization controlled by chiral Al, Ti, Mg, Yb and Zn reagen... 3-METHYL-2,5-DIHYDRO-1-BENZOXEPINS AND 3-METHYL-2,5-DIHYDROOXEPINS [作者：YAMAGUCHI SEIJI,期刊：Heterocycles, 页码：243-263 , 文章类型： Review，,卷期：2009年79-1] Three preparative procedures of seven-membered O-heterocyclic 3-methyl-2,5-dihydro-1-benzoxepin derivatives are summarized. For the Z-selective formation of C=C double bond, the first approach used the Grubbs ring-closin... UNCONVENTIONAL ACTIVATORS IN THE SYNTHESIS OF OLIGONUCLEOTIDES AND THEIR STRUCTURAL ANALOGUES [作者：DABKOWSKI WOJCIECH; MICHALSKI JAN,期刊：Heterocycles, 页码：265-276 , 文章类型： Review，,卷期：2009年79-1] Activation of phosphoramidites as phosphitylating reagents in the synthesis of biophosphates and their structural analogues is of great importance. Tetrazole a customary activator can be conveniently replaced by trimethy... ARTHROPOD ALKALOIDS IN POISON FROGS: A REVIEW OF THE 'DIETARY HYPOTHESIS' [作者：SAPORITO RALPH A; SPANDE THOMAS F; GARRAFFO H MARTIN; DONNELLY MAUREEN A,期刊：Heterocycles, 页码：277-297 , 文章类型： Review，,卷期：2009年79-1] Poison frogs are chemically defended from predators and/or microorganisms by the presence of alkaloids in dermal skin glands. Over the past 40 years, more than 800 alkaloids, which are generally organized into 28 structu... CLAISEN RING EXPANSION APPROACH TOWARD THE CDEF RING SYSTEM OF LANCIFODILACTONE G [作者：PAQUETTE LEO A; LAI KWONG WAH,期刊：Heterocycles, 页码：299-302 , 文章类型： Article，,卷期：2009年79-1] The fused CDEF ring system of lancifodilactone G is assembled via a Nozaki-Hiyama-Kishi cross-coupling reaction and a Petasis-Claisen ring expansion sequence as the key strategic steps. Memorial Preface for Dr. John W. Daly: A Retrospective on Our Collaboration on Batrachotoxin Chemistry [作者：TOKUYAMA TAKASHI,期刊：Heterocycles, 页码：3-60 , 文章类型： Biographical-Item，,卷期：2009年79-1] PALLADIUM-CATALYZED ARYLATION AT C-H AND C-C BONDS OF MASKED THIAZOLE DERIVATIVES [作者：FURUKAWA HIROTOSHI; MATSUMURA SUGURU; SUGIE ATSUSHI; MONGUCHI DAIKI; MORI ATSUNORI,期刊：Heterocycles, 页码：303-309 , 文章类型： Article，,卷期：2009年79-1] The differently substituted 2,5-diarylthiazole derivatives are synthesized via palladium catalyzed sequential C-H arylation at the 5-position and C-C bond activation at the 2-positon with masked thiazole. INTRAMOLECULAR Si-C AND C-H BOND ACTIVATION IN A PLATINUM COMPLEX LEADING TO THE FORMATION OF THE PLATINACYCLES [作者：TOKITOH NORIHIRO; KAWAI MASAHIRO; TAKEDA NOBUHIRO; SASAMORI TAKAHIRO,期刊：Heterocycles, 页码：311-318 , 文章类型： Article，,卷期：2009年79-1] Reduction of dichloroplatinum complex dl-1 bearing two bulky aromatic substituents, Bbt groups (2,6-bis[bis(trimethylsilyl)methyl]-4-[tris(tri-methylsilyl)methyl]pheny l), by sodium metal gave a unique platinacycle 2, a ... PALLADIUM-CATALYZED HETEROARYLAMINATION OF ETHYL 2-CHLORO-1-AZAAZULENE-3-CARBOXYLATE AND ANNULATION OF HETEROARYLAMINO-1-AZAAZULENES [作者：KOIZUMI KAZUYA; SHIMABARA KUNITAKA; TAKEMOTO AYA; YAMAZAKI SHINYA; YAMAUCHI NORIKO; FUJII HIROYUKI; KUROSAWA MASAKI; KONAKAHARA TAKEO; ABE NORITAKA,期刊：Heterocycles, 页码：319-324 , 文章类型： Article，,卷期：2009年79-1] The palladium catalyzed heteroarylamination of ethyl 2-chloro-1-azaazulene-3-carboxylate was achieved using a catalyst based on Pd-2(dba)(3) / Xantphos system. Treatment of ethyl 2-(heteroarylamino)-1-azaazulene-3-carbox... DESIGN AND SYNTHESIS OF A CONFORMATIONALLY RESTRICTED ANALOGUE OF THE EFGH-RING SYSTEM OF CIGUATOXIN [作者：LEE NAYOUNG; INOUE MASAYUKI; HIRAMA MASAHIRO,期刊：Heterocycles, 页码：325-330 , 文章类型： Article，,卷期：2009年79-1] The fused-hexahydrooxonine (F-ring) of ciguatoxin (CTX), as well as its EFGH-ring fragment, undergoes a slow conformational change between two conformers in solution. In this paper, we designed and synthesized a conforma...