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Effect of clay calcination on clay-catalysed Diels-Alder reactions of cyclopentadiene with methyl and (−)-menthyl acrylates. Tetrahedron 1992. [DOI: 10.1016/s0040-4020(01)88236-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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252
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Banks MR, Blake AJ, Cadogan J, Dawson IM, Gosney I, Grant KJ, Gaur S, Hodgson PK, Knight KS, Smith GW, Stevenson (nee Thomson) DE. Enantiospecific preparation of [(2r,6s)-endo]-5-aza-1,10,10-trimethyl-3-oxatricyclo[5.2.1.02,6]decan-4-one by a nitrene-mediated route from [(1s)-endo]-(−)-borneol and its utility as a chiral auxiliary in some asymmetric transformations. Tetrahedron 1992. [DOI: 10.1016/s0040-4020(01)80472-5] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Campbell MM, Rabiasz HS, Sainsbury M, Searle PA, Davies GM. Synthesis of a 5-methylene analogue of 5-enolpyruvylshikimic acid. Tetrahedron 1992. [DOI: 10.1016/s0040-4020(01)85625-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Ager DJ, East MB. Methodology to establish 1,2- and 1,3-difunctionality for the synthesis of carbohydrate derivates. Tetrahedron 1992. [DOI: 10.1016/s0040-4020(01)90970-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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255
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New chiral auxiliaries based on conformation control, a C2-symmetric 2,2-dimethylimidazolidine and 4-chiral, 2,2-dialkyloxazolidines. Synthesis and conformational analysis of acrylamide derivatives. Tetrahedron 1992. [DOI: 10.1016/s0040-4020(01)89439-4] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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256
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Boteju LW, Wegner K, Hruby VJ. Asymmetric synthesis of unusual amino acids: Synthesis of the optically pure isomers of indole-protected β-methyltryptophan suitable for peptide synthesis. Tetrahedron Lett 1992. [DOI: 10.1016/s0040-4039(00)60804-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Andrews JF, Regan AC. Nazarov cyclisation of dienone-esters and tetrahydropyrones using trimethylsilyltriflate. Tetrahedron Lett 1991. [DOI: 10.1016/0040-4039(91)80577-s] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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258
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Gras JL, Pellissier H. Synthèse asymétrique assistée par ligandes. I. modélisation d'auxiliaires chiraux pour la réaction de diels-alder enantiosélective. Tetrahedron Lett 1991. [DOI: 10.1016/0040-4039(91)85035-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Bergdahl M, Nilsson M, Olsson T, Stern K. Highly diastereoselective additions of organocopper reagents to 2-exo-bornyl crotonates. Tetrahedron 1991. [DOI: 10.1016/s0040-4020(01)91033-6] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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260
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Corey E, Cheng XM, Cimprich KA. 1-Mesityl-2,2,2-trifluoroethanol, an outstanding new chiral controller for catalyzed diels-alder reactions. Tetrahedron Lett 1991. [DOI: 10.1016/0040-4039(91)80420-b] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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261
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Kanemasa S, Kobayashi S, Kobayashi S, Nishiuchi M, Yamamoto H, Wada E. Generation of nitrile oxides through O-metalation of hydroximoyl chlorides. Chelation-controlled syn-selective cycloaddition of nitrile oxides to α-substituted allyl alcohols. Tetrahedron Lett 1991. [DOI: 10.1016/0040-4039(91)80171-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Yan TH, Chu VV, Lin TC, Wu CH, Liu LH. Asymmetric alkylation reactions of camphor-based imide enolate. Tetrahedron Lett 1991. [DOI: 10.1016/s0040-4039(00)93507-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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263
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Enantioselective synthesis of α- and β-hydroxy acids using -2-phenylcyclohexan-1-ol-as chiral auxiliary. Tetrahedron Lett 1991. [DOI: 10.1016/s0040-4039(00)92724-2] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Buschmann H, Scharf HD, Hoffmann N, Esser P. Das Isoinversionsprinzip - ein allgemeines Selektionsmodell in der Chemie. Angew Chem Int Ed Engl 1991. [DOI: 10.1002/ange.19911030505] [Citation(s) in RCA: 103] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Kanemasa S, Onimura K, Wada E, Tanaka J. 22,-Dimethyl-4-phenyloxazoline and 2,2-dimethyl-4,5-diphenylimidazolidine as new chiral auxiliaries. Applications to asymmetric nitrile oxide cycloadditions. ACTA ACUST UNITED AC 1991. [DOI: 10.1016/s0957-4166(00)80018-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Asymmetric induction in silyl nitronate cycloadditions to Oppolzer's chiral sultam derivatives. ACTA ACUST UNITED AC 1991. [DOI: 10.1016/s0957-4166(00)82151-5] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Asymmetric Diels-Alder reactions of a nitroso compound derived from D-bornane-10,2-sultam. ACTA ACUST UNITED AC 1991. [DOI: 10.1016/s0957-4166(00)80015-4] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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270
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Annunziata R, Cinquini M, Cozzi F, Fuchicello A. Chelation and non-chelation controlled stereoselective reduction of a-methoxy-a-phenylthio ketones. Tetrahedron 1991. [DOI: 10.1016/s0040-4020(01)80909-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Cativiela C, Figuerasb F, Frailea J, Garcia J, Mayorala J. Clay-catalysed asymmetric diels-alder reaction of cyclopentadiene with (−)-menthyl acrylate. ACTA ACUST UNITED AC 1991. [DOI: 10.1016/s0957-4166(00)86134-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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273
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Uemura M, Oda H, Minami T, Hayashi Y. π-Face differential conjugate addition of organocopper to (o-substituted phenyl α,β-unsaturated ketone)chromium complexes. Tetrahedron Lett 1991. [DOI: 10.1016/0040-4039(91)80040-d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Vasconcellos ML, d'Angelo J, Desmaele D, Costa PR, Potin D. New chiral auxiliaries derived from β -pinene: Their use in the asymmetric reduction of β-keto-esters. ACTA ACUST UNITED AC 1991. [DOI: 10.1016/s0957-4166(00)82117-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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275
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Synthesis of a new ketone and alcohol with C2 symmetry; (S,S,S,S) tricyclo[6.3.0.03,7]undecan-2-onela and (S,S,S,S) tricyclo[6.3.0.03,7]undecan-2-ollb. ACTA ACUST UNITED AC 1991. [DOI: 10.1016/s0957-4166(00)86156-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Kim BH, Lee JY. Asymmetric silyl nitronate cycloadditions with bornane-10,2-sultam derivatives. ACTA ACUST UNITED AC 1991. [DOI: 10.1016/s0957-4166(00)80032-4] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Bergdahl M, Nilsson M, Olsson T. Stereoselective conjugate addition of TMSI-activated butylcopper to 1-(R)-endo-(1-naphthyl)bornyl crotonate. J Organomet Chem 1990. [DOI: 10.1016/0022-328x(90)80182-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Jeong KS, Parris K, Ballester P, Rebek J. Neue chirale Hilfsverbindungen für die Alkylierung von Enolaten. Angew Chem Int Ed Engl 1990. [DOI: 10.1002/ange.19901020514] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Cativiela C, López P, Mayoral J. Asymmetric synthesis of cycloaliphatic α-amino acids with a norbornane skeleton. ACTA ACUST UNITED AC 1990. [DOI: 10.1016/0957-4166(90)90038-c] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Denmark SE, Senanayake C, Ginny-Dai H. Tandem [4+2]/[3+2]-cycloadditions. 2. Asymmetric induction with a chiral vinyl ether. Tetrahedron 1990. [DOI: 10.1016/s0040-4020(01)85599-x] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Piva O, Pete JP. Highly enantioselective protonation of photodienols an unusual substituent effect on the induced chirality. Tetrahedron Lett 1990. [DOI: 10.1016/s0040-4039(00)97830-4] [Citation(s) in RCA: 55] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Martens J, Bhushan R. Importance of enantiomeric purity and its control by thin-layer chromatography. J Pharm Biomed Anal 1990; 8:259-69. [PMID: 2094425 DOI: 10.1016/0731-7085(90)80035-n] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Methods for the direct resolution of enantiomers are important and are necessary for pharmaceutical and biomedical analysis, synthetic and mechanistic studies and various other fields. The present paper deals with the results of recent approaches, such as ligand exchange, ion exchange and steric interactions, providing direct resolution of enantiomers of a variety of compounds by thin-layer chromatography. General aspects of various methods for analysis of enantiomeric purity and resolution have been compared.
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Affiliation(s)
- J Martens
- Fachbereich Chemie, Universität Oldenburg, FRG
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283
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Chiral toluene-2,α-sultam auxiliaries: Asymmetric diels-alder reactions of N-enoyl derivatives. Tetrahedron Lett 1990. [DOI: 10.1016/s0040-4039(00)97793-1] [Citation(s) in RCA: 92] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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285
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Double asymmetric synthesis: Palladium chiral complexes in the alkylation of chiral schiff bases derived from glycine. Tetrahedron Lett 1990. [DOI: 10.1016/s0040-4039(00)94713-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Cativiela C, López P, Mayoral JA. Asymmetric synthesis of 2-aminonorbornane-2-carboxylic acids by Diels-Alder reaction. ACTA ACUST UNITED AC 1990. [DOI: 10.1016/s0957-4166(00)86334-x] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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287
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Ahlbrecht H, Enders D, Santowski L, Zimmermann G. Chirale Homoenolat-Äquivalente, II: Asymmetrische Synthese 3-substituierter Phenylpropionaldehyde über metallierte chirale Cinnamylamine. ACTA ACUST UNITED AC 1989. [DOI: 10.1002/cber.19891221027] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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288
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Oppolzer W, Kingma AJ. Asymmetric Induction on Copper(I) Chloride catalyzed 1,4-addition of alkylmagnesium chlorides to ?, ?-disubstituted (E)-enoylsultams and subsequent protonation. Helv Chim Acta 1989. [DOI: 10.1002/hlca.19890720622] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Cossu S, Delogu G, de Lucchi O, Fabbri D, Licini G. Ethylenbis(sulfonyl)-überbrücktes 1,1′-Binaphthalin, ein atropisomeres Dienophil für hochdiastereoselektive Diels-Alder-Reaktionen. Angew Chem Int Ed Engl 1989. [DOI: 10.1002/ange.19891010614] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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290
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Oppolzer W, Rodriguez I, Blagg J, Bernardinelli G. AsymmetricDiels-Alder reactions: X-Ray crystal-structure analysis of [N-((E)-But-2-enoyl)bornane-10,2-sultam]tetrachlorotitanium. Helv Chim Acta 1989. [DOI: 10.1002/hlca.19890720116] [Citation(s) in RCA: 58] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Oppolzer W, Moretti R, Thomi S. Asymmetric alkylation of N-acylsultams: A general route to enantiomerically pure, crystalline C(α,α)-disubstituted carboxylic acid derivatives. Tetrahedron Lett 1989. [DOI: 10.1016/s0040-4039(01)93810-9] [Citation(s) in RCA: 108] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Pyne SG, Bloem P, Griffith R. Conjugate addition of amines to (Rs)-10-isobornyl vinyl sulfoxides. Tetrahedron 1989. [DOI: 10.1016/s0040-4020(01)89169-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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293
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Ishizuka T, Ishibuchi S, Kunieda T. New camphor-derived auxiliaries in methoxyselenylation and methoxybromination with opposite diastereofacial selectivity. Tetrahedron Lett 1989. [DOI: 10.1016/s0040-4039(00)99269-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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294
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Burgess K, Henderson I. Stereoselective syntheses of γ-hydroxy-α,β-unsaturated esters: An asymmetric version of the “spac” reaction. Tetrahedron Lett 1989. [DOI: 10.1016/s0040-4039(00)99351-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ross Kelly T, Maity SK, Meghani P, Chandrakumar NS. New Lewis acid catalysts for the Diels-Alder reaction. Tetrahedron Lett 1989. [DOI: 10.1016/s0040-4039(00)99464-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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298
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Chiral heterocyclic ligandsVI. (4S,7R)-7,8,8-trimethyl-4,5,6,7-tetrahydro-4,7-methano-1H(2H)-indazole and X-ray structure of a copper(II) complex. Polyhedron 1989. [DOI: 10.1016/s0277-5387(00)86534-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Asymmetric 1,4-additions of gilman reagents to α,β - disubstitoted (e)-enoylsultams / “enolate” protonations. Tetrahedron 1989. [DOI: 10.1016/0040-4020(89)80075-4] [Citation(s) in RCA: 58] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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