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Volumn , Issue 3, 2007, Pages 500-502

New Ugi/Pictet-Spengler multicomponent formation of polycyclic diketopiperazines from isocyanides and α-keto acids

Author keywords

Diketopiperazine; Isocyanide; Multicomponent reaction; Pictet Spengler; Ugi

Indexed keywords

1,4 DIKETOPIPERAZINE; 2 OXOACID; 2,5 PIPERAZINEDIONE; 6 HYDROXYPIPERAZINE; CYANIDE; DIPEPTIDE; ISOCYANIDE; PIPERAZINE DERIVATIVE; PIPERAZINEDIONE; UNCLASSIFIED DRUG;

EID: 33847396935     PISSN: 09365214     EISSN: None     Source Type: Journal    
DOI: 10.1055/s-2007-968026     Document Type: Article
Times cited : (52)

References (27)
  • 7
    • 2542509173 scopus 로고    scopus 로고
    • For general reviews on isocyanide-based multicomponent reactions, see: a
    • For general reviews on isocyanide-based multicomponent reactions, see: (a) Dömling, A.; Ugi, I. Angew. Chem. Int. Ed. 2000, 39, 3168.
    • (2000) Angew. Chem. Int. Ed , vol.39 , pp. 3168
    • Dömling, A.1    Ugi, I.2
  • 20
    • 4243241249 scopus 로고
    • For a review, see
    • For a review, see: Cox, E. D.; Cook, J. M. Chem. Rev. 1995, 95, 1797.
    • (1995) Chem. Rev , vol.95 , pp. 1797
    • Cox, E.D.1    Cook, J.M.2
  • 22
    • 33847414455 scopus 로고    scopus 로고
    • Typical Procedure (Given for 6a, To a solution of 124 mg of o-nitrobenzaldehyde 2a (0.82 mmol, 1 equiv)and 60 mg of butylamine 3a (0.82 mmol, 1 equiv) in MeOH (800 μL, 1 M) were added 157 mg of homoveratryl isocyanide(4a, 0.82 mmol,-1 equiv) and 57 μL of pyruvic acid (1a, 0.82 mmol, 1 equiv) under inert argon atmosphere. The mixture was then stirred at r.t. during 2 h. After concentration under reduced pressure, the crude product was dissolved in 4 mL of TFA (0.2 M) and stirred at r.t. for 1 h. Flash chromatography (50-100% Et2O-petroleum ether gradient) afforded the desired diketopiperazine in a 69% overall yield as a mixture of two diastereomers in a 1:1.2 ratio. Spectroscopic Data for DKP 6a: Major diastereomer: 1H NMR (400 MHz, CDCl3, δ, 7.94 (d, J, 7.8 Hz, 1 H, 7.78 (s, 1 H, 7.40 (dt, J, 3.8, 7.6 Hz, 2 H, 6.74 (d, J, 7.6 Hz, 1 H, 6.55 (s, 1 H, 6.25 (s, 1 H, 4.69 q, J, 7.8 H
    • 3: 467.2056; found: 467.2052.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.