- DFT/MM study on copper-catalyzed cyclopropanation - enantioselectivity with no enthalpy barrier.
[作者:Drudis-Sole, Gali;Maseras, Feliu;Lledos, Agusti;Vallribera, Adelina;Moreno-Manas, Marcial;,期刊:European Journal of Organic Chemistry, 页码:5614-5621 , 文章类型: 研究论文,,卷期:2008年-33]
- The enantioselectivity in the reaction of [Cu(adam-box)-(CHCO2Me)] {adam-box = 2,2'-isopropylidenebis[(4R)-(1-adamantyl)-2-oxazoline]} with Ph2C=CH2 was analyzed computationally by ONIOM(B3LYP:UFF) calcns. The lack of t...
- Kinetic resolution of b-alkenyl-, b-alkynyl- and b-flavenyl-substituted b-hydroxy esters in asymmetric dehydration.
[作者:Lee, Min Hee;Choi, Eui Ta;Kim, Dajung;Lee, Yoon Min;Park, Yong Sun;,期刊:European Journal of Organic Chemistry, 页码:5630-5637 , 文章类型: 研究论文,,卷期:2008年-33]
- Catalytic asym. dehydration of b-alkenyl- or alkynyl-substituted b-hydroxy esters by kinetic resoln. has been investigated with five different chiral ligands 3-7 (I) (X = H, p-Cl, p-F, m-F, p-Me). The kinetic resoln. of...
- Biologically active secondary metabolites from fungi, 39. Dinemasones A, B and C: New bioactive metabolites from the endophytic fungus Dinemasporium strigosum.
[作者:Krohn, Karsten;Sohrab, Md. Hossain;van Ree, Teunis;Draeger, Siegfried;Schulz, Barbara;Antus, Sandor;Kurtin, Tibor;,期刊:European Journal of Organic Chemistry, 页码:5638-5646 , 文章类型: 研究论文,,卷期:2008年-33]
- Two new bioactive metabolites 1a and 2a (dinemasones A, B) were isolated in pure form and one as the diacetate 3b of dinemasone C (3a) from the Et acetate ext. of Dinemasporium strigosum, together with the known palmitic...
- Palladium-catalyzed cyclization/carbonylation as a direct route to 4-[(methoxycarbonyl)methyl]-3,4-dihydroisoquinolinones.
[作者:Attilio Ardizzoia, G.;Beccalli, Egle M.;Borsini, Elena;Brenna, Stefano;Broggini, Gianluigi;Rigamonti, Micol;,期刊:European Journal of Organic Chemistry, 页码:5590-5596 , 文章类型: 研究论文,,卷期:2008年-33]
- An efficient synthetic protocol for the prepn. of 4-[(methoxycarbonyl)methyl]-3,4-dihydroisoquinolin-1-ones from N-allylamides of 2-iodobenzoic acids has been performed under 100 atm of carbon monoxide. Pyridine ring fo...
- Unsymmetrical biaryls by palladium-catalyzed coupling of aryl halides with internal reduction.
[作者:Satyanarayana, Gedu;Maier, Martin E.;,期刊:European Journal of Organic Chemistry, 页码:5543-5552 , 文章类型: 研究论文,,卷期:2008年-33]
- Aryl bromides I (R1 = H, OMe; R2 = H, Me, OMe; Bn = PhCH2) contg. a (1,4,5,6-tetrahydro-6-oxopyridin-3-yl)methyl substituent can be coupled with aryl halides ArX (Ar = Ph, 4-MeC6H4, 3-MeOC6H4, 4-MeOC6H4, 3,5-Me2C6H3, 4-M...
- The combination of diallylboration and ring-closing metathesis in the synthesis of spiro-b-amino alcohols and (?-cephalotaxine.
[作者:Kuznetsov, Nikolai Yu.;Kolomnikova, Galina D.;Khrustalev, Victor N.;Golovanov, Denis G.;Bubnov, Yuri N.;,期刊:European Journal of Organic Chemistry, 页码:5647-5655 , 文章类型: 研究论文,,卷期:2008年-33]
- A convenient and practical methodol. for the prepn. of various spiro-b-amino alcs. I [X = (CH2)n; n = 0, 1, 2; R1 = R2 = H, Me; R1 = H, R2 = CH2OH] has been elaborated. The approach involves allylboration and ring-closi...
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