Helmchen G - Search Results

1

Gold-catalyzed intermolecular addition of carbonyl compounds to 1,6-enynes: reactivity, scope, and mechanistic aspects.

Schelwies M, Moser R, Dempwolff AL, Rominger F, Helmchen G. Schelwies M, et al. Among authors: helmchen g. Chemistry. 2009 Oct 19;15(41):10888-900. doi: 10.1002/chem.200901614. Chemistry. 2009. PMID: 19746480

2

(Phosphanyloxazoline)palladium complexes, part I: (Eta3-1,3-dialkylallyl)(phosphanyloxazoline)palladium complexes: X-ray crystallographic studies, NMR investigations, and quantum-chemical calculations.

Kollmar M, Goldfuss B, Reggelin M, Rominger F, Helmchen G. Kollmar M, et al. Among authors: helmchen g. Chemistry. 2001 Nov 19;7(22):4913-27. doi: 10.1002/1521-3765(20011119)7:22<4913::aid-chem4913>3.0.co;2-7. Chemistry. 2001. PMID: 11763460

3

(Eta3-phenylallyl)(phosphanyloxazoline)palladium complexes: X-ray crystallographic studies, NMR investigations, and Ab initio/DFT calculations.

Kollmar M, Steinhagen H, Janssen JP, Goldfuss B, Malinovskaya SA, Vázquez J, Rominger F, Helmchen G. Kollmar M, et al. Among authors: helmchen g. Chemistry. 2002 Jul 15;8(14):3103-14. doi: 10.1002/1521-3765(20020715)8:14<3103::AID-CHEM3103>3.0.CO;2-C. Chemistry. 2002. PMID: 12203340

4

Carbocycles via enantioselective inter- and intramolecular iridium-catalysed allylic alkylations.

Streiff S, Welter C, Schelwies M, Lipowsky G, Miller N, Helmchen G. Streiff S, et al. Among authors: helmchen g. Chem Commun (Camb). 2005 Jun 21;(23):2957-9. doi: 10.1039/b503713a. Epub 2005 Jun 21. Chem Commun (Camb). 2005. PMID: 15957038

5

Enantioselective modular synthesis of 2,4-disubstituted cyclopentenones by iridium-catalyzed allylic alkylation.

Schelwies M, Dübon P, Helmchen G. Schelwies M, et al. Among authors: helmchen g. Angew Chem Int Ed Engl. 2006 Apr 3;45(15):2466-9. doi: 10.1002/anie.200503945. Angew Chem Int Ed Engl. 2006. PMID: 16526068 No abstract available.

6

Iridium-catalysed asymmetric allylic substitutions.

Helmchen G, Dahnz A, Dübon P, Schelwies M, Weihofen R. Helmchen G, et al. Chem Commun (Camb). 2007 Feb 21;(7):675-91. doi: 10.1039/b614169b. Epub 2006 Dec 6. Chem Commun (Camb). 2007. PMID: 17392951

7

Gold-catalyzed intermolecular addition of carbonyl compounds to 1,6-enynes.

Schelwies M, Dempwolff AL, Rominger F, Helmchen G. Schelwies M, et al. Among authors: helmchen g. Angew Chem Int Ed Engl. 2007;46(29):5598-601. doi: 10.1002/anie.200701378. Angew Chem Int Ed Engl. 2007. PMID: 17583886 No abstract available.

8

Preparation of 2,4-disubstituted cyclopentenones by enantioselective iridium-catalyzed allylic alkylation: synthesis of 2'-methylcarbovir and TEI-9826.

Dübon P, Schelwies M, Helmchen G. Dübon P, et al. Among authors: helmchen g. Chemistry. 2008;14(22):6722-33. doi: 10.1002/chem.200800495. Chemistry. 2008. PMID: 18576413

9

Stereoselective synthesis of 2,6-disubstituted piperidines using the iridium-catalyzed allylic cyclization as configurational switch: asymmetric total synthesis of (+)-241 d and related piperidine alkaloids.

Gnamm C, Krauter CM, Brödner K, Helmchen G. Gnamm C, et al. Among authors: helmchen g. Chemistry. 2009;15(9):2050-4. doi: 10.1002/chem.200802525. Chemistry. 2009. PMID: 19180605

10

A configurational switch based on iridium-catalyzed allylic cyclization: application in asymmetric total syntheses of prosopis, dendrobate, and spruce alkaloids.

Gnamm C, Brödner K, Krauter CM, Helmchen G. Gnamm C, et al. Among authors: helmchen g. Chemistry. 2009 Oct 12;15(40):10514-32. doi: 10.1002/chem.200901316. Chemistry. 2009. PMID: 19731272

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