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Volumn 45, Issue 43, 2004, Pages 8057-8059

Chemoenzymatic synthesis of (3S,4S)- and (3R,4R)-3-methoxy-4- methylaminopyrrolidine

Author keywords

[No Author keywords available]

Indexed keywords

1 BENZYLOXYCARBONYL 3 PYRROLINE; 1 TERT BUTOXYCARBONYL 3 TERT BUTOXYCARBONYLAMINO 4 METHOXYPYRROLIDINE; 3 AZIDO 1 BENZYLOXYCARBONYL 4 HYDROXYPYRROLIDINE; 3 METHOXY 4 METHYLAMINOPYRROLIDINE; AG 7352; ANTINEOPLASTIC AGENT; BACTERIAL ENZYME; HYDROXYL GROUP; PYRROLIDINE DERIVATIVE; TRIACYLGLYCEROL LIPASE; UNCLASSIFIED DRUG;

EID: 4644316301     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.tetlet.2004.08.167     Document Type: Article
Times cited : (16)

References (29)
  • 2
    • 0004237729 scopus 로고
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    • G. Massiot, and C. Delaude A. Brossi The Alkaloids Vol. 27 1986 Academic New York Chapter 3
    • (1986) The Alkaloids , vol.27
    • Massiot, G.1    Delaude, C.2
  • 3
    • 0004228346 scopus 로고
    • A. Brossi Academic New York
    • A. Numata, and T. Ibuka A. Brossi The Alkaloids Vol. 31 1987 Academic New York Chapter 6
    • (1987) The Alkaloids , vol.31
    • Numata, A.1    Ibuka, T.2
  • 4
    • 0004230722 scopus 로고
    • S.W. Pelletier Academic New York
    • A. Elbein, and R.I. Molyneux S.W. Pelletier The Alkaloids Vol. 5 1990 Academic New York Chapter 1
    • (1990) The Alkaloids , vol.5
    • Elbein, A.1    Molyneux, R.I.2
  • 23
    • 4644242908 scopus 로고    scopus 로고
    • note
    • Different lipases were screened, among them Pseudomonas cepacia (PS-C) gives good enantioselectivity within 10 h compared to PS-D. Pseudomonas cepacia lipase (PS), Pseudomonas fluorescens (AK-20), Lipozyme immobilized from Mucor miehei, Candida rugosa lipase gave lower enantioselectivities. There were no significant conversions by employing lipases from Candida antartica, Porcine pancreas, and Candida cylindracea
  • 24
    • 4644279258 scopus 로고    scopus 로고
    • note
    • A number of solvents such as diisopropyl ether, toluene, THF, tert-butyl methyl ether, and hexane were examined for this protocol. It was observed that diisopropyl ether was efficient for this lipase mediated resolution, whereas toluene takes longer (2 days) reaction times and gave comparatively low enantioselectivity. The results employing THF, tert-butyl methyl ether, and hexane were not satisfactory
  • 25
    • 4644300925 scopus 로고    scopus 로고
    • note
    • General procedure for lipase mediated transesterification: To a solution of (±)-trans-3-azido-1-Cbz-4-hydroxypyrrolidine 7 (1 mmol) in diisopropyl ether (10 mL) was added lipase PS-C (1 equiv w/w), vinyl acetate (6 mmol). The suspension was shaken at 150 rpm at 40°C. The reaction mixture was monitored by chiral HPLC analysis until it reached about 50% conversion (10 h). The reaction was filtered and the filtrate was washed with water followed by brine. The organic layer was dried over anhydrous sodium sulfate, concentrated under reduced pressure, and purified by silica gel column chromatography. The enantiopurity of the products (3S,4S)-7 and (3R,4R)-8 were determined by a chiral HPLC using Chiralcel OD column (hexane-isopropanol, 80:20) with 0.5 mL/min flow rate and compared with the corresponding racemic products
  • 26
    • 4644222403 scopus 로고    scopus 로고
    • note
    • 3)
  • 27
    • 4644249631 scopus 로고    scopus 로고
    • note
    • 3)
  • 28
    • 4644328523 scopus 로고    scopus 로고
    • note
    • 3)
  • 29
    • 4644334450 scopus 로고    scopus 로고
    • note
    • ++1)


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.