- Ferrier glycosylation reaction catalyzed by Bi(OTf)3-montmorillonite K-10: efficient synthesis of 3,4-unsaturated sialic acid derivatives.
[作者:Ikeda, Kiyoshi;Ueno, Yayoi;Kitani, Satoru;Nishino, Reiko;Sato, Masayuki;,期刊:SYNLETT, 页码:1027-1030 , 文章类型: 研究论文,,卷期:2008年-7]
- The reaction of the 4,5-oxazoline deriv. of sialic acid with various alcs. was effectively promoted by a catalytic amt. of montmorillonite K-10 clay-supported Bi(OTf)3 to produce a variety of 3,4-unsatd. sialic acids via...
- Selective b-hydroxyethylation at the N-1 position of a pyrazolone.
[作者:Synthesis of benzyl 1-(b-hydroxyethyl)-5-methyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazole-4-c;,期刊:SYNLETT, 页码:1005-1008 , 文章类型: 研究论文,,卷期:2008年-7]
- Selective 2-hydroxyethylation at the N-1 position of benzyl 5-methyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazole-4-carboxylate with epoxides was achieved using either AlMe3 or Mg(ClO4)2 under mild conditions. The epoxide rin...
- Novel use of N-carboalkoxy a,b-unsaturated iminium ions as dienophiles in Diels-Alder reactions.
[作者:O'Connor, Patrick D.;Korber, Karsten;Brimble, Margaret A.;,期刊:SYNLETT, 页码:1036-1038 , 文章类型: 研究论文,,卷期:2008年-7]
- Tricyclic spiro-N,O-acetals were assembled in a single step by cycloaddn. of hydroxymethyl dienes to iminium ion-activated dienophiles that were generated by acidolysis of a,b-unsatd. N-carboalkoxy N,O-acetals or b-metho...
- Regioselective synthesis of functionalized resorcins by cyclization of 1,3-bis(trimethylsilyloxy)-1,3-butadienes with 3,3-dimethoxypentanoyl chloride.
[作者:Sher, Muhammad;Langer, Peter;,期刊:SYNLETT, 页码:1050-1052 , 文章类型: 研究论文,,卷期:2008年-7]
- 26 Functionalized resorcins are regioselectively prepd. by cyclization of 1,3-bis(trimethylsilyloxy)-1,3-butadienes with 3,3-dimethoxypentanoyl chloride. The regioselectivity is controlled by the type of Lewis acid empl...
- Iron(III) chloride catalyzed Nazarov cyclization of 3-substituted thiophene derivatives.
[作者:Kawatsura, Motoi;Higuchi, Yuji;Hayase, Shuichi;Nanjo, Masato;Itoh, Toshiyuki;,期刊:SYNLETT, 页码:1009-1012 , 文章类型: 研究论文,,卷期:2008年-7]
- The Nazarov cyclization of silicon-free 3-substituted thiophene derivs. was effectively catalyzed by 10 mol% FeCl3, which provided the desired cyclized trans product in good yield.
- New cationic bisoxazoline-Au(III) complex catalyzed cycloisomerization of 1-allenyl-1-ethynyl acetate.
[作者:Kato, Keisuke;Kobayashi, Takuya;Fujinami, Takeo;Motodate, Satoshi;Kusakabe, Taichi;Mochida, Tomoyuki;Akita, Hiroyuki;,期刊:SYNLETT, 页码:1081-1085 , 文章类型: 研究论文,,卷期:2008年-7]
- Treatment of 1-allenyl-1-ethynyl acetates in the presence of a Au or Pt catalyst (5 mol%) in toluene at room temp., followed by methanolysis, gave 4-methylene-2-cyclopentenones. The new cationic bisoxazoline (box)-Au(II...
- A new class of chiral Lewis basic metal-free catalysts for stereoselective allylations of aldehydes.
[作者:Simonini, Valentina;Benaglia, Maurizio;Pignataro, Luca;Guizzetti, Stefania;Celentano, Giuseppe;,期刊:SYNLETT, 页码:1061-1065 , 文章类型: 研究论文,,卷期:2008年-7]
- A new class of amine N-oxides derived from trans-2,5-diphenylpyrrolidine were synthesized in enantiomerically pure form and tested as metal-free catalysts in the reaction of aldehydes with allyltrichlorosilane to afford ...
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