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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28条记录   New solvent free organic synthesis using focused microwaves [作者：Loupy, A; Petit, A; Hamelin, J; Texier-Boullet, F; Jacquault, P; Mathe, D,期刊：Synthesis, 页码：1213-1234 , 文章类型： Review，,卷期：1998年-9] In this review, we report the advantages of dry reaction techniques coupled with focused microwave activation and their applications to organic synthesis using acidic and basic supports, and enzymatic or phase-transfer c... Preparation of diazenes by electrophilic C-coupling reactions of dry arenediazonium o-benzenedisulfonimides with Grignard reagents [作者：Barbero, M; Degani, I; Dughera, S; Fochi, R; Perracino, P,期刊：Synthesis, 页码：1235-1237 , 文章类型： Article，,卷期：1998年-9] The diaryldiazenes (19 examples) and aryl(tert-butyl)diazenes (3 examples) 3 were prepared by electrophilic C-coupling reactions of dry arenediazonium o-benzenedisulfonimides 1 with Grignard reagents. The reactions were ... A facile and selective procedure for oxidation of sulfides to sulfoxides with molecular bromine on hydrated silica gel in dichloromethane [作者：Ali, MH; Bohnert, GJ,期刊：Synthesis, 页码：1238-1240 , 文章类型： Article，,卷期：1998年-9] A new method for oxidation of sulfides to sulfoxides with molecular bromine on a solid silica gel support has been developed. This procedure cleanly oxidizes sulfides to the corresponding sulfoxides in excellent yields. ... A simple method for the preparation of new alpha-oxoacetic acid esters with a plug flow reactor [作者：Hollwedel, F; Kossmehl, G,期刊：Synthesis, 页码：1241-1242 , 文章类型： Article，,卷期：1998年-9] The formation of ethyl 2-(2-substituted-4,5-dimethoxyphenyl)-2-oxoacetates in high yield, with negligible byproducts, by reaction of 2-substituted 4,5-dimethoxyphenyl bromides with diethyl oxalate using a plug flow react... A direct one-pot preparation or naphtho[2,3-b]furan-4,9-diones from 2-hydroxy-1,4-naphthoquinones and enamines [作者：Kobayashi, K; Tanaka, K; Uneda, T; Maeda, K; Morikawa, O; Konishi, H,期刊：Synthesis, 页码：1243-1245 , 文章类型： Article，,卷期：1998年-9] The reaction of 2-hydroxy-1,4-naphthoquinones with enamines, derived from ketones, in refluxing toluene afforded the corresponding 2,3-disubstituted naphtho[2,3-b]furan-4,9-dione derivatives in moderate to good yields. Preparation of 1,2-diacetoxycycloalkenes and related acyclic systems [作者：Lange, GL; Merica, A,期刊：Synthesis, 页码：1246-1248 , 文章类型： Article，,卷期：1998年-9] Preparation of the previously unavailable 1,2-diacetoxycycloalkenes from the corresponding 1,2-bis-(trimethylsilyloxy)cycloalkenes using 4-pyrrolidinopyridine as catalyst is described. A similar conversion of two acyclic... Three-component coupling reaction: Palladium-catalyzed coupling of norbornadiene and iodonium salts or diazonium salts with organostannanes, alkynes, and sodium tetraphenylborate [作者：Kang, SK; Kim, JS; Choi, SC; Lim, KH,期刊：Synthesis, 页码：1249-1251 , 文章类型： Article，,卷期：1998年-9] A ternary coupling of norbornadiene and iodonium salts or diazonium salts with organostannanes, alkynes, or sodium tetraphenylborate catalyzed by ligand-free palladium was accomplished at ambient temperature under mild c... Copper-catalyzed cross-coupling of 1-iodoalkynes with organostannanes [作者：Kang, SK; Kim, WY; Jiao, XG,期刊：Synthesis, 页码：1252-1254 , 文章类型： Article，,卷期：1998年-9] Copper-catalyzed cross-coupling of 1-iodoalkynes with organostannanes was readily achieved in the presence of CuI (10 mol%) in DMF at room temperature for 6 hours by adding 1-iodolkynes slowly to organostannanes. Synthesis of enantioenriched methyl vic-dihydroxystearates [作者：Plate, M; Overs, M; Schafer, HJ,期刊：Synthesis, 页码：1255-1258 , 文章类型： Article，,卷期：1998年-9] Several enantioenriched methyl vic-dihydroxystearates 4 have been synthesized from methyl octadecenoates by enantioselective dihydroxylation in good yields (85-97%) and with satisfactory enantiomeric excess tee 80-97%), ... An efficient large-scale synthesis of (R)-(-)-mevalonolactone using simple biological and chemical catalysts [作者：Orru, RVA; Osprian, I; Kroutil, W; Faber, K,期刊：Synthesis, 页码：1259-1263 , 文章类型： Article，,卷期：1998年-9] Natural (R)-(-)-mevalonolactone (2) was synthesized in eight steps in 55% total yield and >99% ee employing an enantioconvergent chemoenzymatic route. In the key step, 2-benzyl-2-methyloxirane (+/-)-3 was deracemized on ... Transmetallation from aluminum to tin: A facile preparation of tributylstannylprop-2-en-1-ols [作者：Havranek, M; Dvorak, D,期刊：Synthesis, 页码：1264-1268 , 文章类型： Article，,卷期：1998年-9] 3-Substituted 3-tributylstannylprop-2-en-1-ols 2 can be efficiently prepared by hydroalumination of 3-substituted propargyl alcohols 1 with LiAlH4 and subsequent transmetallation to tin employing Bu3SnOMe instead of the ... Ligands with cycloalkane backbones Part 6; (1) A series of chiral 2-pyrazolyl-cyclohexan-1-ols: Synthesis, spectroscopic features and kinetic resolution [作者：Barz, M; Glas, H; Thiel, WR,期刊：Synthesis, 页码：1269-1273 , 文章类型： Article，,卷期：1998年-9] Nucleophilic ring opening of epoxycyclohexane with a variety of pyrazoles afforded racemic 2-pyrazolylcyclohexan-1-ols in high yields. The kinetic resolution of these 1,3-diamino alcohols was achieved by enantioselective... Regio- and stereoselective lithiation and C-substitution of (S)-2-(Dibenzylamino)-butane-1,4-diol via dicarbamates [作者：Guarnieri, W; Sendzik, M; Frohlich, R; Hoppe, D,期刊：Synthesis, 页码：1274-1286 , 文章类型： Article，,卷期：1998年-9] The 1,4-O,O'-dicarbamate 5, derived from (S)-2-(dibenzylamino)butane-1,4-diol, 1,4-diol, is prepared from L-aspartic acid in three synthetic steps. Deprotonation with sec-butyllithium removes the 1-pro-S proton with esse... Monocarbamates, derived from (S)-2-(dibenzylamino)butane-1,4-diol, and the influence of the second O-protecting group on the regioselectivity of deprotonation application to the synthesis of the boletus toxin (2S,4S)-gamma-hydroxy-norvaline [作者：Sendzik, M; Guarnieri, W; Hoppe, D,期刊：Synthesis, 页码：1287-1297 , 文章类型： Article，,卷期：1998年-9] Differentially protected 1-O- and 4-O-monocarbamates, derived from (S)-2-(dibenzylamino)butane-1,4-diol are prepared and investigated with respect to their capability of being deprotonated and forming the corresponding l... Convenient syntheses of 2-alkyl(aryl)-4,5-diphenyloxazoles and 2-alkyl(aryl)-4-phenyloxazoles [作者：Pei, WW; Li, SH; Nie, XP; Li, YW; Pei, J; Chen, BZ; Wu, J; Ye, XL,期刊：Synthesis, 页码：1298-1304 , 文章类型： Article，,卷期：1998年-9] The synthetic methods to prepare 2-alkyl(aryl)-4,5-diphenyloxazoles and 2-alkyl(aryl)-4-phenyloxazoles were improved on the basis of a mechanistic study of oxazole formation from alpha-hydroxy ketones (carboxylic esters ... Organophosphorus compounds; 129. Mesitylphosphaacetylene: Synthesis and reactivity studies of a new phosphaalkyne [作者：Mack, A; Pierron, E; Allspach, T; Bergstrasser, U; Regitz, M,期刊：Synthesis, 页码：1305-1313 , 文章类型： Article，,卷期：1998年-9] Mesitylphosphaacetylene (1b) has been synthesized by AlCl3 initiated elimination of bis(trimethylsilyl) ether from the phosphaalkene 2b. This new phosphaalkyne undergoes [3+2] cycloaddition reactions with diazo compounds...