201
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De Sarkar S, Studer A. NHC-katalysierte Michael-Additionen an α,β-ungesättigte Aldehyde unter Redoxaktivierung. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201004593] [Citation(s) in RCA: 102] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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202
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Koyama Y, Kataoka H, Suzuki K, Matsumoto T. Regioselective Remote Functionalization of Biaryl Framework via Tethered ortho-Quinol Intermediate. Chem Asian J 2010; 6:355-8. [DOI: 10.1002/asia.201000533] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2010] [Indexed: 11/12/2022]
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203
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Broekhof NLJM, van der Gen A. Enamine synthesis using the Horner-Wittig
reaction. Part 1. (Aminomethyl)diphenylphosphine oxides, new formyl anion equivalents. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/recl.19841031102] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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204
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Schmidt RR. Functionally Substituted Vinyl Carbanions Versatile Intermediates in Heterocyclic Synthesis. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19830920909] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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205
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Beaulieu MA, Sabot C, Achache N, Guérard KC, Canesi S. An Oxidative Prins-Pinacol Tandem Process and its Application to the synthesis of (−)-Platensimycin. Chemistry 2010; 16:11224-8. [DOI: 10.1002/chem.201001813] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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206
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Berkessel A, Elfert S, Etzenbach-Effers K, Teles JH. Umpolung von Aldehyden mit N-heterocyclischen Carbenen: NMR-Charakterisierung des Breslow-Intermediats in seiner Ketoform und eines Spirodioxolans als “resting state” des katalytischen Systems. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200907275] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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207
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Berkessel A, Elfert S, Etzenbach-Effers K, Teles JH. Aldehyde Umpolung by N-Heterocyclic Carbenes: NMR Characterization of the Breslow Intermediate in its Keto Form, and a Spiro-Dioxolane as the Resting State of the Catalytic System. Angew Chem Int Ed Engl 2010; 49:7120-4. [DOI: 10.1002/anie.200907275] [Citation(s) in RCA: 123] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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208
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Hashimoto T, Kimura H, Maruoka K. Enantioselective Formal Alkenylations of Imines Catalyzed by Axially Chiral Dicarboxylic Acid Using Vinylogous Aza-Enamines. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201003600] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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209
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Hashimoto T, Kimura H, Maruoka K. Enantioselective Formal Alkenylations of Imines Catalyzed by Axially Chiral Dicarboxylic Acid Using Vinylogous Aza-Enamines. Angew Chem Int Ed Engl 2010; 49:6844-7. [DOI: 10.1002/anie.201003600] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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210
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Volla C, Marković D, Laclef S, Vogel P. The Catalyzed Desulfinylative Allylation of Carbonyl Compounds with Alk-2-enesulfonyl Chlorides and Silyl Alk-2-enesulfinates. Chemistry 2010; 16:8984-8. [DOI: 10.1002/chem.201000705] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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211
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Wang Z, Chen D, Yang Z, Bai S, Liu X, Lin L, Feng X. Highly Enantioselective Synthesis of α-Stereogenic Esters through Catalytic Asymmetric Michael Addition of 4-Oxo-4-arylbutenoates. Chemistry 2010; 16:10130-6. [DOI: 10.1002/chem.201001129] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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212
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213
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214
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Knappke CEI, Neudörfl JM, von Wangelin AJ. On new N-heterocyclic carbene derived alkylidene imidazolines. Org Biomol Chem 2010; 8:1695-705. [DOI: 10.1039/b921655c] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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215
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Sprecher H, Pletscher S, Möri M, Marti R, Gaul C, Patora-Komisarska K, Otchertianova E, Beck A, Seebach D. Applications of the Chiral Auxiliaries DIOZ and TRIOZ for Conjugate Additions and Comparison with Other Auxiliaries. Helv Chim Acta 2010. [DOI: 10.1002/hlca.200900385] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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216
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Lewis acid-mediated reactions of 1-cyclopropyl-2-arylethanone derivatives with diethyl 2-oxomalonate and ethyl 2-oxoacetate. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.09.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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217
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Blay G, Fernández I, Monleón A, Muñoz MC, Pedro J, Vila C. Synthesis of Functionalized Indoles with an α-Stereogenic Ketone Moiety Through an Enantioselective Friedel-Crafts Alkylation with (E)-1,4-Diaryl-2-butene-1,4-diones. Adv Synth Catal 2009. [DOI: 10.1002/adsc.200900357] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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218
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Narayana Murthy S, Madhav B, Prakash Reddy V, Rama Rao K, Nageswar Y. An approach toward the synthesis of β-hydroxy sulfones on water. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.06.078] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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219
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Jiang Z, Yang Y, Pan Y, Zhao Y, Liu H, Tan CH. Synthesis of alpha-stereogenic amides and ketones by enantioselective conjugate addition of 1,4-dicarbonyl but-2-enes. Chemistry 2009; 15:4925-30. [PMID: 19301341 DOI: 10.1002/chem.200802601] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
In the conjugate addition reaction of a alpha,beta-unsaturated compound, the new stereogenic center is created in the beta-position. In contrast, conjugate addition to 1,4-dicarbonyl but-2-enes will generate an alpha-stereogenic center with respect to one of the carbonyl groups, which informally, can be considered as an inversion of normal reactivity patterns or Umpolung. In this paper, we demonstrate that chiral bicyclic guanidine can catalyze the addition of 1,3-dicarbonyl compounds to 1,4-dicarbonyl but-2-enes [(E)-4-oxo-4-arylbutenamides and (E)-4-oxo-4-arylbutenones] with high regioselectivity and enantioselectivity (ee values up to 97%).
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Affiliation(s)
- Zhiyong Jiang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore
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220
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Arduengo, III AJ, Iconaru LI. Fused polycyclic nucleophilic carbenes – synthesis, structure, and function. Dalton Trans 2009:6903-14. [DOI: 10.1039/b907211j] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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221
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Kison C, Opatz T. Modular Synthesis of Tetrasubstituted Imidazoles and Trisubstituted Oxazoles by Aldimine Cross-Coupling. Chemistry 2008; 15:843-5. [DOI: 10.1002/chem.200802175] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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222
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Seebach D, Grošelj U, Badine D, Schweizer W, Beck A. Isolation and X-Ray Structures of Reactive Intermediates of Organocatalysis with Diphenylprolinol Ethers and with Imidazolidinones. Helv Chim Acta 2008. [DOI: 10.1002/hlca.200890216] [Citation(s) in RCA: 155] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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223
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Guin J, De Sarkar S, Grimme S, Studer A. Biomimetische Carben-katalysierte Oxidation von Aldehyden mit TEMPO. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200802735] [Citation(s) in RCA: 118] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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224
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Guin J, De Sarkar S, Grimme S, Studer A. Biomimetic Carbene-Catalyzed Oxidations of Aldehydes Using TEMPO. Angew Chem Int Ed Engl 2008; 47:8727-30. [DOI: 10.1002/anie.200802735] [Citation(s) in RCA: 304] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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225
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Shi M, Tang XY, Yang YH. Lewis acid-mediated reactions of 1-cyclopropyl-2-arylethanone derivatives with allenic ester, ethyl acetoacetate, and methyl acrylate. J Org Chem 2008; 73:5311-8. [PMID: 18570403 DOI: 10.1021/jo800608h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
TMSOTf-mediated reactions of 2-aryl-1-(1-phenylcyclopropyl)ethanones 1 with allenic esters afford a novel method for the synthesis of 6-methyl-3a,7-diaryl-3,3a-dihydro-2H-benzofuran-4-one derivatives 2 in moderate yields. In addition, we also found that TMSOTf-mediated reactions of 1-cyclopropyl-2-arylethanones with ethyl acetoacetate can provide the corresponding 2,3-dihydrobenzofuran-4-ol and dihydrofuro[2,3-h]chromen-2-one in moderate yields via a sequential reaction involving a nucleophilic ring-opening reaction of the cyclopropane by H2O, one intermolecular aldol type reaction and two intramolecular aldol type reactions, a cyclic transesterification, dehydration, and aromatization. Moreover, by using methyl acrylate to replace allenic ester, the corresponding 7-aryl-3,5,6,7-tetrahydro-2H-benzofuran-4-one and 5-aryl-3,5,6,7-tetrahydro-2 H-benzofuran-4-one can be formed in moderate to high yields in the presence of Bi(OTf)2Cl. Plausible reaction mechanisms have also been provided on the basis of control experiments.
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Affiliation(s)
- Min Shi
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China.
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226
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Li GQ, Li Y, Dai LX, You SL. Enantioselective Synthesis ofcis-4-Formyl-β-lactamsviaChiral N-Heterocyclic Carbene-Catalyzed Kinetic Resolution. Adv Synth Catal 2008. [DOI: 10.1002/adsc.200800071] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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227
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Enders D, Han J. Synthesis of enantiopure triazolium salts from pyroglutamic acid and their evaluation in the benzoin condensation. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.tetasy.2008.05.017] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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228
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Weiss R, Bess M, Huber SM, Heinemann FW. Nucleophilic β-Oniovinylation: Concept, Mechanism, Scope, and Applications. J Am Chem Soc 2008; 130:4610-7. [PMID: 18341332 DOI: 10.1021/ja071316a] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Robert Weiss
- Department of Chemistry and Pharmacy, Organic Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestrasse 42, D-91054 Erlangen, Germany, and Department of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 1, D-91058 Erlangen, Germany
| | - Matthias Bess
- Department of Chemistry and Pharmacy, Organic Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestrasse 42, D-91054 Erlangen, Germany, and Department of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 1, D-91058 Erlangen, Germany
| | - Stefan M. Huber
- Department of Chemistry and Pharmacy, Organic Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestrasse 42, D-91054 Erlangen, Germany, and Department of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 1, D-91058 Erlangen, Germany
| | - Frank W. Heinemann
- Department of Chemistry and Pharmacy, Organic Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestrasse 42, D-91054 Erlangen, Germany, and Department of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 1, D-91058 Erlangen, Germany
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229
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230
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231
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232
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Schumacher M, Goldfuss B. Umpolung catalysis: assessment of catalyst and substrate reactivities in acyloin type reactions. Tetrahedron 2008. [DOI: 10.1016/j.tet.2007.12.019] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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233
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Brehme R, Enders D, Fernandez R, Lassaletta JM. Aldehyde
N
,
N
‐Dialkylhydrazones as Neutral Acyl Anion Equivalents: Umpolung of the Imine Reactivity. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700746] [Citation(s) in RCA: 165] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Rainer Brehme
- Max‐Planck‐Institut für Colloid‐ und Grenzflächenforschung, Abt. Grenzflächen, Wissenschaftspark Golm, 14424 Potsdam, Germany
| | - Dieter Enders
- RWTH Aachen University, Institute of Organic Chemistry Landoltweg 1, 52074 Aachen, Germany
| | - Rosario Fernandez
- Departamento de Quimica Organica, Universidad de Sevilla, Apdo. de Correos 553, 41071Seville, Spain
| | - José M. Lassaletta
- Instituto de Investigaciones Quimicas (CSIC‐US), Americo Vespucio 49, 41092 Seville, Spain
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234
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Affiliation(s)
- Dieter Enders
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| | - Oliver Niemeier
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| | - Alexander Henseler
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
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235
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Reynolds T, Scheidt K. Catalytic Enantioselective α-Acylvinyl Anion Reactions of Silyloxyallenes. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200702818] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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236
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Shi M, Tang XY, Yang YH. Lewis Acid Mediated Reactions of 1-Cyclopropyl-2-arylethanones with Allenic Esters: A Facile Synthetic Protocol for the Preparation of Dihydrofuro[2,3-h]chromen-2-one Derivatives. Org Lett 2007; 9:4017-20. [PMID: 17727290 DOI: 10.1021/ol701713y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
TMSOTf-mediated reactions of 1-cyclopropyl-2-arylethanones with allenic esters afford a novel method for the synthesis of dihydrofuro[2,3-h]chromen-2-one derivatives in moderate to good yields. This process is a sequential reaction involving a nucleophilic ring-opening reaction of the cyclopropane by H(2)O, two intermolecular aldol-type reactions and one intramolecular aldol-type reaction, a cyclic transesterification, dehydration, and aromatization mediated by Lewis acid.
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Affiliation(s)
- Min Shi
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China.
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237
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Wilson RM, Danishefsky SJ. Small molecule natural products in the discovery of therapeutic agents: the synthesis connection. J Org Chem 2007; 71:8329-51. [PMID: 17064003 DOI: 10.1021/jo0610053] [Citation(s) in RCA: 294] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Natural products have been a rich source of agents of value in medicine. They have also inspired, at various levels, the fashioning of nonnatural agents of pharmaceutical import. Hitherto, these nonnatural derivatives have been primarily synthesized by manipulating the natural product. As a consequence of major innovations in the subscience of synthetic methodology, the capacity of synthesis to deal with molecules of considerable complexity has increased dramatically. In this paper, we show by example some total syntheses which draw from strategy-enabling advances in methodology. Moreover, we show how these capabilities can be used to discover and develop new agents of potential pharmaceutical value without recourse to the natural product itself.
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Affiliation(s)
- Rebecca M Wilson
- Laboratory for Bioorganic Chemistry, Sloan-Kettering Institute for Cancer Research, 1275 York Avenue, New York, New York 10021, USA
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238
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Weidmann B, Seebach D. Organometallverbindungen von Titan und Zirconium als selektive nucleophile Reagentien für die Organische Synthese. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.19830950103] [Citation(s) in RCA: 157] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Beat Weidmann
- Laboratorium für Organische Chemie der Eidgenössischen Technischen Hochschule ETH‐Zentrum, Universitätstrasse 16, CH‐8092 Zürich (Schweiz)
| | - Dieter Seebach
- Laboratorium für Organische Chemie der Eidgenössischen Technischen Hochschule ETH‐Zentrum, Universitätstrasse 16, CH‐8092 Zürich (Schweiz)
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239
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Bojer D, Kamps I, Tian X, Hepp A, Pape T, Fröhlich R, Mitzel N. Carbanionen mit zwei N-Substituenten als nucleophile Acyltransfer-Reagentien. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200700113] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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240
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Barluenga J, Fanlo H, López S, Flórez J. [4+1]/[2+1] Cycloaddition Reactions of Fischer Carbene Complexes with α,β-Unsaturated Ketones and Aldehydes. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200605167] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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241
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Barluenga J, Fanlo H, López S, Flórez J. [4+1]/[2+1] Cycloaddition Reactions of Fischer Carbene Complexes with α,β-Unsaturated Ketones and Aldehydes. Angew Chem Int Ed Engl 2007; 46:4136-40. [PMID: 17440911 DOI: 10.1002/anie.200605167] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- José Barluenga
- Instituto Universitario de Química Organometálica, Enrique Moles, Unidad Asociada al CSIC, Universidad de Oviedo, Oviedo, Spain
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242
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Bojer D, Kamps I, Tian X, Hepp A, Pape T, Fröhlich R, Mitzel NW. Carbanions with Two N Substituents: Nucleophilic Acyl-Group-Transfer Reagents. Angew Chem Int Ed Engl 2007; 46:4176-9. [PMID: 17444543 DOI: 10.1002/anie.200700113] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Daniel Bojer
- Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Münster, Germany
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243
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244
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Eschenmoser A. On a Hypothetical Generational Relationship between HCN and Constituents of the Reductive Citric Acid Cycle. Chem Biodivers 2007; 4:554-73. [PMID: 17443871 DOI: 10.1002/cbdv.200790050] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Encouraged by observations made on the course of reactions the HCN-tetramer can undergo with acetaldehyde, I delineate a constitutional and potentially generational relationship between HCN and those constituents of the reductive citric acid cycle that are direct precursors of amino acids in contemporary metabolism. In this context, the robustness postulate of classical prebiotic chemistry is questioned, and, by an analysis of the (hypothetical) reaction-tree of a stepwise hydrolysis of the HCN-tetramer, it is shown how such a non-robust chemical reaction platform could harbor the potential for the emergence of autocatalytic cycles. It is concluded that the chemistry of HCN should be revisited by focussing on its non-robust parts in order to demonstrate its full potential as one of the possible roots of prebiotic self-organizing chemical processes.
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Affiliation(s)
- Albert Eschenmoser
- Laboratory of Organic Chemistry, Swiss Federal Institute of Technology, Hönggerberg HCI H309, Wolfgang-Pauli-Strasse 10, CH-8093 Zürich.
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245
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Affiliation(s)
- Sun-Joon Min
- The Department of Chemistry, Columbia University, Havemeyer Hall, New York, NY 10027, USA
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246
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247
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Enders D, Bonten MH, Raabe G. Asymmetric Nucleophilic Glyoxylation through a Metalated α-Aminonitrile Derivative in Michael Additions to Nitroalkenes. Angew Chem Int Ed Engl 2007; 46:2314-6. [PMID: 17300124 DOI: 10.1002/anie.200604802] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Dieter Enders
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany.
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248
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Enders D, Bonten M, Raabe G. Asymmetrische nucleophile Glyoxylierung durch metallierte α-Aminonitril-Derivate in Michael-Additionen an Nitroalkene. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200604802] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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249
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Reynolds TE, Scheidt KA. Catalytic enantioselective alpha-acylvinyl anion reactions of silyloxyallenes. Angew Chem Int Ed Engl 2007; 46:7806-9. [PMID: 17849415 PMCID: PMC2976584 DOI: 10.1002/anie.200702818] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Troy E. Reynolds
- Department of Chemistry, Northwestern University 2145 Sheridan Road, Evanston, IL 60208 (USA) Fax: (+ 1) 847-467-2184
| | - Karl A. Scheidt
- Department of Chemistry, Northwestern University 2145 Sheridan Road, Evanston, IL 60208 (USA) Fax: (+ 1) 847-467-2184
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Schaumann E. Silyl thioacetals: Versatile building blocks for organic synthesis. HETEROATOM CHEMISTRY 2007. [DOI: 10.1002/hc.20344] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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