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Volumn 9, Issue 14, 2007, Pages 2621-2624

Highly enantioselective decarboxylative protonation of α- aminomalonates mediated by thiourea Cinchona alkaloid derivatives: Access to both enantiomers of cyclic and acyclic α-aminoacids

Author keywords

[No Author keywords available]

Indexed keywords

ALKALOID; AMINO ACID; CARBOXYLIC ACID; MALONIC ACID DERIVATIVE; PROTON; QUININE; SOLVENT; THIOUREA;

EID: 34547408925     PISSN: 15237060     EISSN: None     Source Type: Journal    
DOI: 10.1021/ol070712v     Document Type: Article
Times cited : (91)

References (43)
  • 22
    • 0142072631 scopus 로고    scopus 로고
    • Selected bifunctional organocatalysis: (a) Okino, T.; Hoashi, Y.; Takemoto, Y. J. Am. Chem. Soc. 2003, 125, 12672-12673.
    • Selected bifunctional organocatalysis: (a) Okino, T.; Hoashi, Y.; Takemoto, Y. J. Am. Chem. Soc. 2003, 125, 12672-12673.
  • 33
    • 28544451072 scopus 로고    scopus 로고
    • (l) Lattanzi, A. Org. Lett. 2005, 7, 2579-2582.
    • (2005) Org. Lett , vol.7 , pp. 2579-2582
    • Lattanzi, A.1
  • 34
    • 33644747543 scopus 로고    scopus 로고
    • Thiourea catalysts of cinchona alkaloids: (a) Tillman, A. L.; Ye, J.; Dixon, D. J. Chem. Commun. 2006, 1191-1193.
    • Thiourea catalysts of cinchona alkaloids: (a) Tillman, A. L.; Ye, J.; Dixon, D. J. Chem. Commun. 2006, 1191-1193.
  • 41
    • 34547395147 scopus 로고    scopus 로고
    • Absolute stereochemistry was determined by comparison with known data (ref 5). New compounds were independently synthesized from the corresponding optically pure aminoacids.
    • Absolute stereochemistry was determined by comparison with known data (ref 5). New compounds were independently synthesized from the corresponding optically pure aminoacids.
  • 42
    • 34547437975 scopus 로고    scopus 로고
    • 3 sample kept at rt for 7 days, whereas no decarboxylation was observed with 7a, 11a, or 15a under the same conditions. This suggests that the sulfur atom of the thiophene ring is basic enough to promote self-decarboxylation.
    • 3 sample kept at rt for 7 days, whereas no decarboxylation was observed with 7a, 11a, or 15a under the same conditions. This suggests that the sulfur atom of the thiophene ring is basic enough to promote self-decarboxylation.
  • 43
    • 34547486713 scopus 로고    scopus 로고
    • This result is similar to our previous attempt of a catalytic reaction with substrate 7a. 7b was obtained with 72% ee with use of 10% of epicinchonine at room temperature, see ref 5c
    • This result is similar to our previous attempt of a catalytic reaction with substrate 7a. 7b was obtained with 72% ee with use of 10% of epicinchonine at room temperature, see ref 5c.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.