- 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...
- 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.
- 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...
- 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%), ...
- 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 ...
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