메뉴 건너뛰기




Volumn , Issue 10, 2007, Pages 1605-1609

Organocatalytic enantioselective synthesis of secondary α-hydroxycarboxylates

Author keywords

hydroxycarboxylate; Aldol reaction; Enantioselectivity; Ethyl glyoxylate; Ketones; Organocatalysis

Indexed keywords

CARBOXYLIC ACID DERIVATIVE; DIPEPTIDE; ETHYLGLYOXYLATE; GLYOXYLIC ACID DERIVATIVE; KETONE DERIVATIVE; PROLINE DERIVATIVE; UNCLASSIFIED DRUG;

EID: 34347371630     PISSN: 09365214     EISSN: None     Source Type: Journal    
DOI: 10.1055/s-2007-982552     Document Type: Article
Times cited : (28)

References (51)
  • 1
    • 34347388845 scopus 로고    scopus 로고
    • For a review, see: α-Hydroxy Acids in Enantioselective Synthesis; Copolla, G. M.; Schuster, H. F., Eds.; Wiley-VCH: Weinheim, 1997.
    • For a review, see: α-Hydroxy Acids in Enantioselective Synthesis; Copolla, G. M.; Schuster, H. F., Eds.; Wiley-VCH: Weinheim, 1997.
  • 16
    • 0034654216 scopus 로고    scopus 로고
    • List, B.; Lerner, R. A.; Barbas, C. F. III J. Am. Chem. Soc. 2000, 122, 2395.
    • (a) List, B.; Lerner, R. A.; Barbas, C. F. III J. Am. Chem. Soc. 2000, 122, 2395.
  • 19
    • 0034812506 scopus 로고    scopus 로고
    • Sakthivel, K.; Notz, W.; Bui, T.; Barbas, C. F. III J. Am. Chem. Soc. 2001, 123, 5260.
    • (d) Sakthivel, K.; Notz, W.; Bui, T.; Barbas, C. F. III J. Am. Chem. Soc. 2001, 123, 5260.
  • 21
  • 23
    • 0037043180 scopus 로고    scopus 로고
    • For reviews, see: h
    • For reviews, see: (h) List, B. Tetrahedron 2002, 58, 5573.
    • (2002) Tetrahedron , vol.58 , pp. 5573
    • List, B.1
  • 25
    • 4143114533 scopus 로고    scopus 로고
    • Notz, W.; Tanaka, F.; Barbas, C. F. III Acc. Chem. Res. 2004, 37, 580.
    • (j) Notz, W.; Tanaka, F.; Barbas, C. F. III Acc. Chem. Res. 2004, 37, 580.
  • 36
    • 33646508100 scopus 로고    scopus 로고
    • Suri, J. T.; Mitsumori, S.; Albertshofer, K.; Tanaka, F.; Barbas, C. F. III J. Org. Chem. 2006, 71, 3822.
    • (b) Suri, J. T.; Mitsumori, S.; Albertshofer, K.; Tanaka, F.; Barbas, C. F. III J. Org. Chem. 2006, 71, 3822.
  • 49
    • 34347379563 scopus 로고    scopus 로고
    • General Experimental Procedure To a stirred solution of ethyl glyoxylate (51.0 mg, 0.5 mmol) and the ketone (0.25 mL) in CHCl3 (0.25 mL) was added catalyst 5 (13.6 mg, 0.05 mmol) at -10°C. The reaction mixture was stirred at this temperature for 24-72 h. The solvent was then evaporated under vacuum and the residue was purified by flash chromatography (EtOAc-hexane, 1:2) over silica gel to furnish the desired secondary -hydroxycarboxylate as a pure compound. 1H NMR and 13C NMR data of new compounds are collected below. Compound 5: 1H NMR (500 MHz, CDCl3, 0.83 (t, J, 7.5 Hz, 6 H, 1.90-1.92 (m, 1 H, 1.99 (s, 3 H, 2.06-2.11 (m, 2 H, 2.96 (d, J, 3.0 Hz, 2 H, 3.79 (t, J, 8.0 Hz, 1 H, 4.12 (q, J, 4.5 Hz, 1 H, 5.08 (d, J, 2.5 Hz, 1 H, 8.10 (d, J, 9.5 Hz, 1 H, CONH) ppm. 13C NMR 125 MHz, CDCl3, 18.3, 19.8, 21.7, 31.1, 37.6, 53.0, 57
    • 3): = 14.3, 29.9, 32.6, 44.4, 56.0, 62.2, 71.0, 172.9, 208.0 ppm.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.