ASYMMETRIC-SYNTHESIS .28. HYDROXYLATED BENZOQUINOLIZIDINE ANALOGS OF PODOPHYLLOTOXIN VIA THE CN(R,S) METHOD
The condensation of 2-cyano-6-phenyloxazolopiperidine synthon (-)-5 with piperonal, gave after reduction, the optically pure pivotal amino-alcohol 8. Two strategies were developed to prepare the epimeric azapodophyllotoxin analogues 2 and 3 via Grignard reactions on an iminium ion generated from the...
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Published in | Tetrahedron Vol. 49; no. 19; pp. 3995 - 4006 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
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Elsevier
07.05.1993
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Abstract | The condensation of 2-cyano-6-phenyloxazolopiperidine synthon (-)-5 with piperonal, gave after reduction, the optically pure pivotal amino-alcohol 8. Two strategies were developed to prepare the epimeric azapodophyllotoxin analogues 2 and 3 via Grignard reactions on an iminium ion generated from the common intermediate 8. The first strategy was based on an intramolecular reaction while the second involved a stereocontrolled addition reaction on iminium ion 20. |
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AbstractList | The condensation of 2-cyano-6-phenyloxazolopiperidine synthon (-)-5 with piperonal, gave after reduction, the optically pure pivotal amino-alcohol 8. Two strategies were developed to prepare the epimeric azapodophyllotoxin analogues 2 and 3 via Grignard reactions on an iminium ion generated from the common intermediate 8. The first strategy was based on an intramolecular reaction while the second involved a stereocontrolled addition reaction on iminium ion 20. |
Author | QUIRION, JC LIENARD, P HUSSON, HP |
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Keywords | BENZOQUINOLIZIDINE CN(R,S) METHOD, ALPHA-AMINONITRILE, ALPHA-AMINOETHER, STEREOCONTROLLED ALKYLATION OF IMINIUM ION ENANTIOSPECIFIC SYNTHESIS ASYMMETRIC SYNTHESIS PODOPHYLLOTOXIN ANALOGS ALKALOIDS |
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References | LIENARD, P (WOS:A1991FL31300019) 1991; 32 MAIGROT, N (WOS:A1984SB35200025) 1984 ITOH, N (WOS:A1959WR18000003) 1959; 6 AITKEN DJ (WOS:A1993LB89100008.3) TOMIOKA, K (WOS:A1989AD64300023) 1989; 30 UNGEMACH, F (WOS:A1981KX40500036) 1981; 46 ARAI Y (BCI:BCI197051003236) 1968; 88 BONIN M (WOS:A1993LB89100008.7) 1991; 70 BOISSIN, P (WOS:A1989AP03300013) 1989; 30 BOHLMANN, F (WOS:A1957WT15300011) 1957; 69 WOS:A1993LB89100008.1 WOS:A1993LB89100008.2 KRIMEN LI (WOS:A1993LB89100008.13) 1970; 50 STORK G (WOS:A1993LB89100008.19) 1979; 20 VANDEREYCKEN, J (WOS:A1989AJ90800037) 1989; 30 TSUDA, Y (WOS:A1972N065300013) 1972 GUERRIER, L (WOS:A1983RX40100054) 1983; 105 KADOW, JF (WOS:A1989AF79600016) 1989; 30 BOSMANS, JP (WOS:A1989AJ90800038) 1989; 30 VANDEWALLE M (WOS:A1993LB89100008.25) 1988; 10 PEARCE, HL (WOS:A1989T545000003) 1989; 30 RICE, KC (WOS:A1980JF34300009) 1980; 45 DENG, L (WOS:A1991ET34700006) 1991; 32 RATOVELOMANANA, V (WOS:A1985ANS1100017) 1985; 26 TOMIOKA, K (WOS:A1989AZ87300020) 1989 |
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SYNTHESIS OF SOME KETONIC ISOQUINOLINES publication-title: TETRAHEDRON contributor: fullname: ITOH, N – volume: 88 start-page: 1197 year: 1968 ident: BCI:BCI197051003236 article-title: STUDIES ON THE ANTI TUMOR ACTIVITY OF ISO QUINOLINE DERIVATIVES PART 3 ON THE RELATIONSHIP BETWEEN TOXICITY AND CHEMICAL CONSTITUTION OF ISO QUINOLINE DERIVATIVES publication-title: Yakugaku Zasshi contributor: fullname: ARAI Y – volume: 105 start-page: 7754 year: 1983 ident: WOS:A1983RX40100054 article-title: CHIRAL 1,4-DIHYDROPYRIDINE EQUIVALENTS - A NEW APPROACH TO THE ASYMMETRIC-SYNTHESIS OF ALKALOIDS - THE ENANTIOSPECIFIC SYNTHESIS OF (+)-CONIINE AND (-)-CONIINE AND DIHYDROPINIDINE publication-title: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY contributor: fullname: GUERRIER, L – volume: 26 start-page: 3803 year: 1985 ident: WOS:A1985ANS1100017 article-title: ASYMMETRIC-SYNTHESIS .5. ENANTIOSPECIFIC SYNTHESIS OF BETA-AMINOALCOHOLS IN THE PIPERIDINE SERIES - (+)-BETA-CONHYDRINE publication-title: TETRAHEDRON LETTERS contributor: fullname: RATOVELOMANANA, V – volume: 10 start-page: 510 year: 1988 ident: WOS:A1993LB89100008.25 publication-title: ANN DRUG DATA REPORT contributor: fullname: VANDEWALLE M – ident: WOS:A1993LB89100008.1 – volume: 46 start-page: 164 year: 1981 ident: WOS:A1981KX40500036 article-title: STEREOSPECIFIC SYNTHESIS OF TRANS-1,3-DISUBSTITUTED-1,2,3,4-TETRAHYDRO-BETA-CARBOLINES publication-title: JOURNAL OF ORGANIC CHEMISTRY contributor: fullname: UNGEMACH, F – volume: 30 start-page: 3877 year: 1989 ident: WOS:A1989AJ90800038 article-title: THE SYNTHESIS OF 2-AZAPODOPHYLLOTOXINS publication-title: TETRAHEDRON LETTERS contributor: fullname: BOSMANS, JP – start-page: 40 year: 1984 ident: WOS:A1984SB35200025 article-title: HIGH DIASTEREOSELECTIVITY IN THE REACTION OF ALPHA-AMINONITRILES BEARING AN (S)-(+)-2-METHOXYMETHYLPYRROLIDINE GROUP WITH GRIGNARD-REAGENTS publication-title: JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS contributor: fullname: MAIGROT, N – volume: 30 start-page: 3299 year: 1989 ident: WOS:A1989AF79600016 article-title: SYNTHESIS OF ETOPOSIDE LACTAM VIA A MITSUNOBU REACTION SEQUENCE publication-title: TETRAHEDRON LETTERS contributor: fullname: KADOW, JF – ident: WOS:A1993LB89100008.2 – volume: 70 start-page: 54 year: 1991 ident: WOS:A1993LB89100008.7 publication-title: ORG SYNTH contributor: fullname: BONIN M – volume: 45 start-page: 601 year: 1980 ident: WOS:A1980JF34300009 article-title: PAVINAN AND ISOPAVINAN ALKALOIDS - SYNTHESIS OF RACEMIC AND NATURAL THALIDINE, BISNORARGEMONINE, AND CONGENERS FROM N-NORRETICULINE publication-title: JOURNAL OF ORGANIC CHEMISTRY contributor: fullname: RICE, KC – start-page: 1622 year: 1989 ident: WOS:A1989AZ87300020 article-title: EFFICIENT STEREOSELECTIVE SYNTHESIS OF 2-AZA-4'-DEMETHYLEPIPODOPHYLLOTOXIN publication-title: JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS contributor: fullname: TOMIOKA, K – volume: 69 start-page: 641 year: 1957 ident: WOS:A1957WT15300011 article-title: ZUR KONFIGURATIONSBESTIMMUNG VON CHINOLIZIN-DERIVATEN publication-title: ANGEWANDTE CHEMIE-INTERNATIONAL EDITION contributor: fullname: BOHLMANN, F – volume: 30 start-page: 2953 year: 1989 ident: WOS:A1989AD64300023 article-title: SYNTHESIS AND ANTITUMOR-ACTIVITY OF PODOPHYLLOTOXIN AZA-ANALOGUES publication-title: TETRAHEDRON LETTERS contributor: fullname: TOMIOKA, K – volume: 32 start-page: 175 year: 1991 ident: WOS:A1991ET34700006 article-title: STEREOSPECIFICITY IN THE PICTET-SPENGLER REACTION - KINETIC VS THERMODYNAMIC CONTROL publication-title: TETRAHEDRON LETTERS contributor: fullname: DENG, L – volume: 30 start-page: 3873 year: 1989 ident: WOS:A1989AJ90800037 article-title: THE SYNTHESIS OF 4-DESOXY-2-AZAPODOPHYLLOTOXINS publication-title: TETRAHEDRON LETTERS contributor: fullname: VANDEREYCKEN, J – volume: 50 start-page: 1 year: 1970 ident: WOS:A1993LB89100008.13 publication-title: ORG SYN contributor: fullname: KRIMEN LI – volume: 32 start-page: 2489 year: 1991 ident: WOS:A1991FL31300019 article-title: ASYMMETRIC-SYNTHESIS .24. BENZOQUINOLIZIDINE ANALOGS OF PODOPHYLLOTOXIN VIA THE CN(R, S) METHOD publication-title: TETRAHEDRON LETTERS contributor: fullname: LIENARD, P |
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Snippet | The condensation of 2-cyano-6-phenyloxazolopiperidine synthon (-)-5 with piperonal, gave after reduction, the optically pure pivotal amino-alcohol 8. Two... |
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Title | ASYMMETRIC-SYNTHESIS .28. HYDROXYLATED BENZOQUINOLIZIDINE ANALOGS OF PODOPHYLLOTOXIN VIA THE CN(R,S) METHOD |
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