메뉴 건너뛰기




Volumn 1989, Issue 12, 1989, Pages 1215-1232

Synthesis of Nonproteinogenic (R)‐ or (S)‐Amino Acids Analogues of Phenylalanine, Isotopically Labelled and Cyclic Amino Acids from tert‐Butyl 2‐(tert‐Butyl)‐3‐methyl‐4‐oxo‐1‐imidazolidinecarboxylate (Boc‐BMI)

Author keywords

Diamino dicarboxylic acids; Glycine enolate derivatives, chiral; Lithium enolates, reactivity of; Amino acids, 4 to 7 membered heterocyclic; Deuterio amino acids

Indexed keywords


EID: 84986674631     PISSN: 01702041     EISSN: 10990690     Source Type: Journal    
DOI: 10.1002/jlac.198919890293     Document Type: Article
Times cited : (138)

References (98)
  • 1
    • 84986660643 scopus 로고    scopus 로고
    • Fellow of the exchange programme between the Royal Society and the Schweizerische Nationalfonds zur Förderung der wissenschaftlichen Forschung 1987/1988.
  • 2
    • 84986660641 scopus 로고    scopus 로고
    • Part of the Diplomarbeit. of L. B. and S. C., ETH Zürich, 1989, respectively
  • 18
    • 1542692819 scopus 로고
    • Enantiomerentrennung von (R,S)-2-(tert-Butyl)-3-methyl-4-imidazolidinon, einem chiralen Baustein für die Aminosäuresynthese
    • 14a
    • (1986) Angewandte Chemie , vol.98 , pp. 363
    • Fitzi, R.1    Seebach, D.2
  • 23
    • 84986706514 scopus 로고
    • 15a, Ph. D. Thesis., No. 8616, ETH Zürich
    • (1988)
    • Müller, S.G.1
  • 25
    • 84986706532 scopus 로고    scopus 로고
    • 14,0.17.
  • 27
    • 84986639196 scopus 로고
    • 17b, in Abstract Book of the 14th International Congress of Biochemistry. (No. TH0.009), Prague, July
    • (1988) , pp. 10-15
    • Kast, P.1    Hennecke, H.2
  • 40
    • 84986727574 scopus 로고    scopus 로고
    • 0.32.
  • 52
    • 84986686146 scopus 로고    scopus 로고
    • We are proceeding towards more highly functionalized derivatives of type C and D; the results will be described separately.
  • 53
    • 84986690453 scopus 로고    scopus 로고
    • Only with benzyl chlorides, such as in the preparation of 1e, is warming to higher temp. necessary for completion of the reaction.
  • 55
    • 0001269629 scopus 로고
    • Struktur und Reaktivität von Lithiumenolaten, vom Pinakolon zur selektivenC-Alkylierung von Peptiden – Schwierigkeiten und Möglichkeiten durch komplexe Strukturen
    • (1988) Angewandte Chemie , vol.100 , pp. 1685
    • Seebach, D.1
  • 59
    • 84986660667 scopus 로고    scopus 로고
    • 32b, Viallefont et al. have described the synthesis of cyclic and open‐chain halogeno amino acid derivatives, using similar strategy: alkylation with an α,ω‐dihalogeno electrophile gives a monohalogeno intermediate which is cyclized to the desired product.
  • 60
    • 84986690470 scopus 로고    scopus 로고
    • 1H‐NMR spectra believed to be due to the existence of rotamers.
  • 61
    • 84986686158 scopus 로고    scopus 로고
    • 0.14). Attempted 8‐membered ring formation from 12 (R = Me; n = 0.6) yields the iodo analogue of 13 in 61% yield [calcd. from ( S)‐Boc‐BMI].
  • 63
    • 84986706608 scopus 로고    scopus 로고
    • 3; n = 0.3) cyclizes spontaneously upon hydrogen carbonate treatment after the (acidic) Boc removal.
  • 67
    • 84986660678 scopus 로고
    • Ph. D Thesis., No. 8397, ETH Zurich
    • (1987)
    • Huber, I.1
  • 68
    • 84986649343 scopus 로고    scopus 로고
    • The iodo compound 22 was used precisely because we did not know at the outset whether the basicity or nucleophilicity of the enolate of 21 would dominate with the corresponding chloro precursor. In using compounds 12 as alkylating agents (when R ≠ H), halide exchange need not be carried out, but the reactions should be conducted in the presence of DMPU.
  • 70
    • 84956106373 scopus 로고
    • N,O-Acetals from Pivalaldehyde and Amino Acids for the ?-Alkylation with Self-Reproduction of the Center of Chirality. Enolates of 3-Benzoyl-2-(tert-butyl)-1,3-oxazolidin-5-ones
    • (1985) Helvetica Chimica Acta , vol.68 , pp. 1243
    • Seebach, D.1    Fadel, A.2
  • 71
    • 84986719084 scopus 로고    scopus 로고
    • In the construction of type B amino acids from oxazolidinones, the use of BuLi is not tolerated in the case of the phenylalanine‐derived cycle although it is to a greater extent with that from methionine. However, even simple deprotonation and reprotonation of oxazolidinone derivatives is not selective, and 1:1 mixtures of diastereoisomers are formed; the presence of additional reaction components voids the relative simplicity of this synthetic operation.
  • 85
    • 84986688616 scopus 로고    scopus 로고
    • We suspect that some decomposition occurs during hydrolysis.
  • 89
    • 84986718919 scopus 로고    scopus 로고
    • The reaction had been initially carried out on a smaller scale using ( R)‐(+)‐Boc‐BMI to yield 86% of ent‐3a
  • 90
    • 84986685240 scopus 로고    scopus 로고
    • The reaction had been initially carried out on a smaller scale using (R)‐(+)‐Boc‐BMI to yield 79% ofent‐3b.
  • 92
    • 84986685249 scopus 로고    scopus 로고
    • Smaller amounts of THF are sufficient and more convenient in reactions on a scale greater than 5 mmol; the total volume used for 12b for example was 80 ml of THF without any difficulties.
  • 93
    • 84986719137 scopus 로고    scopus 로고
    • Compound 14d has also been synthesized directly from (S)‐Boc‐BMI in 61% yield without needing to purify either 12d or 13d; this represents an avergage of 85% yield for each of the three steps.
  • 94
    • 84986685255 scopus 로고    scopus 로고
    • 5 for ca. 18 h [m. p. 202–205° (dec.)].


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.