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Volumn 75, Issue 6, 2010, Pages 2077-2080

Stereoselective syntheses of L-pipecolic acid and (2S,3S)-3- hydroxypipecolic acid from a chiral n-imino-2-phenyl-1,2-dihydropyridine intermediate

Author keywords

[No Author keywords available]

Indexed keywords

3-HYDROXYPIPECOLIC ACID; CHEMICAL EQUATIONS; DIHYDROPYRIDINES; HETERO-DIELS-ALDER REACTIONS; PIPECOLIC ACID; STEREOSELECTIVE SYNTHESIS;

EID: 77949864262     PISSN: 00223263     EISSN: 15206904     Source Type: Journal    
DOI: 10.1021/jo902527s     Document Type: Article
Times cited : (45)

References (99)
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    • Racemic synthesis
    • (b) Racemic synthesis: Ladenburg, A. Ber. 1891, 24, 640.
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  • 3
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    • First resolution
    • (c) First resolution: Mende, F. Ber Dtsch. Chem. Ges. 1896, 29, 2887.
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    • For the utilization of L-pipecohc acid N-oxides derivatives as ligands in the indiumcatalyzed allylation of ketones, see
    • (c) Yoshimura, Y.; Ohara, C.; Miyagawa, T.; Takahata, H. Heterocycles 2009, 77, 635. For the utilization of L-pipecohc acid N-oxides derivatives as ligands in the indiumcatalyzed allylation of ketones, see:
    • (2009) Heterocycles , vol.77 , pp. 635
    • Yoshimura, Y.1    Ohara, C.2    Miyagawa, T.3    Takahata, H.4
  • 59
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    • For the synthesis of febrifugme, see: (a) For synthesis of other relevant trans-2-substituted-3-hydroxypiperidines, see
    • For the synthesis of febrifugme, see: (a) Kobayashi, S.; Ueno, M.; Suzuki, R.; Ishitani, H.; Kim, H.-S.; Wataya, Y. J. J. Org: Ctem. 1999, 64, 6833. For synthesis of other relevant trans-2-substituted-3-hydroxypiperidines, see:
    • (1999) J. Org: Ctem. , vol.64 , pp. 6833
    • Kobayashi, S.1    Ueno, M.2    Suzuki, R.3    Ishitani, H.4    Kim, H.-S.5    Wataya, Y.J.6
  • 78
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    • No regio- or diastereocontrol occurs when organohthium reagents are added to N-iminopyridinium salts.
    • No regio- or diastereocontrol occurs when organohthium reagents are added to N-iminopyridinium salts.
  • 80
    • 37049067391 scopus 로고
    • Cyanide addition to the chiral pyridinium salt 4 was also investigated, with limited, success. Reaction of 4 with trimethylsilyl cyanide in the presence of aluminum chloride resulted in the formation of a new adduct, which proved, too labile for isolation. Chiral amide starting material 3 was recovered, presumably after reversible cyanide liberation and hydrolysis of the pyridinium salt. For related examples, see: (a)
    • Cyanide addition to the chiral pyridinium salt 4 was also investigated, with limited, success. Reaction of 4 with trimethylsilyl cyanide in the presence of aluminum chloride resulted in the formation of a new adduct, which proved, too labile for isolation. Chiral amide starting material 3 was recovered, presumably after reversible cyanide liberation and hydrolysis of the pyridinium salt. For related examples, see: (a) Popp, F. D.; Takeuchi, I.; Kant, J.; Hamada, Y. J. Chem. Soc., Chem. Commun. 1987, 1765.
    • (1987) Chem. Soc., Chem. Commun. , pp. 1765
    • Popp, F.D.1    Takeuchi, I.2    Kant, J.3    Hamada, Y.J.4
  • 83
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    • For use in pipecolic acid derivatives, see
    • (b) Shioiri, T.; Matsuura, F.; Hamada, Y. Pure Appl. Chem. 1994, 66, 2151. For use in pipecolic acid derivatives, see:
    • (1994) Pure Appl. Chem. , vol.66 , pp. 2151
    • Shioiri, T.1    Matsuura, F.2    Hamada, Y.3
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    • See ref 14k.
    • (e) See ref 14k.
  • 88
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    • Regioselectivity of 1,2- vs 1,4-addition, > 98:2; diastereoselectivity of addition at C-2, > 98:2.
    • Regioselectivity of 1,2- vs 1,4-addition, > 98:2; diastereoselectivity of addition at C-2, > 98:2.
  • 89
    • 77949794803 scopus 로고    scopus 로고
    • Hydrogenation to piperidine failed when a 2-furyl substituent was present at C-2 on the dihydropyridine, instead of the phenyl group shown. The N-debenzylation process led to the opening of the piperidine ring if a more electron-rich furan was present at C-2.
    • Hydrogenation to piperidine failed when a 2-furyl substituent was present at C-2 on the dihydropyridine, instead of the phenyl group shown. The N-debenzylation process led to the opening of the piperidine ring if a more electron-rich furan was present at C-2.
  • 90
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    • Reduction of the amidine chiral auxiliary is readily accomplished with alane (2.5 h). We used the following procedure for alane preparation: Using DIBAL-H instead of alane required, extensive reaction time in dichloromethane, or refluxing the solution in toluene (4 h) to give similar yield, of product.
    • Reduction of the amidine chiral auxiliary is readily accomplished with alane (2.5 h). We used the following procedure for alane preparation: Finholt, A. E.; Bond, A. C., Jr.; Schlesinger, H. I. J. Am. Chem. Soc.1947, 69, 1199. Using DIBAL-H instead of alane required, extensive reaction time in dichloromethane, or refluxing the solution in toluene (4 h) to give similar yield, of product.
    • (1947) J. Am. Chem. Soc. , vol.69 , pp. 1199
    • Finholt, A.E.1    Bond Jr., A.C.2    Schlesinger, H.I.3
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    • Compound 11 was derived to its methyl ester (lia), which allowed for enantiomeric determination. See the Supporting Information.
    • Compound 11 was derived to its methyl ester (lia), which allowed for enantiomeric determination. See the Supporting Information.
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    • For precedents on singlet oxygen HDA with dihydropyridines, see: (a)
    • For precedents on singlet oxygen HDA with dihydropyridines, see: (a) Natsume, M.; Sekine, Y.; Soyagimi, H. Chem. Pharm. Bull. 1978, 26, 2188.
    • (1978) Chem. Pharm. Bull. , vol.26 , pp. 2188
    • Natsume, M.1    Sekine, Y.2    Soyagimi, H.3
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    • Singlet oxygen reacted on the less hindered face of the dihydropyridine ring (>98:2 dr), i.e. anti to the 2-phenyl group (which is forced to be axial by the amidine electron-withdrawing group).
    • Singlet oxygen reacted on the less hindered face of the dihydropyridine ring (>98:2 dr), i.e. anti to the 2-phenyl group (which is forced to be axial by the amidine electron-withdrawing group).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.