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Volumn 13, Issue 5, 2009, Pages 880-887

Large-scale synthesis of a selective inhibitor of the norepinephrine transporter: Mechanistic aspects of conversion of indolinone diol to indolinone aminoalcohol and process implications

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EID: 70449393475     PISSN: 10836160     EISSN: 1520586X     Source Type: Journal    
DOI: 10.1021/op900141r     Document Type: Article
Times cited : (7)

References (30)
  • 1
    • 33947207840 scopus 로고    scopus 로고
    • (a) For a review on norepinephrine reuptake inhibitors, see: Babu, R. P. K.; Maiti, S. N. Heterocycles 2006, 69, 539.
    • (2006) Heterocycles , vol.69 , pp. 539
    • Babu, R.P.K.1    Maiti, S.N.2
  • 20
    • 84915878448 scopus 로고
    • (b) Examples of imidate salt formation from A-(γ-haloalkyl)- phthalimide or-amide derivatives on treatment with Ag salts have been reported: Huenig, S.; Geldern, L. J. Prakt. Chem. 1964, 24, 246.
    • (1964) Prakt. Chem. , vol.24 , pp. 246
    • Huenig, S.1    Geldern, L.J.2
  • 22
    • 0028918733 scopus 로고
    • (d) For cyclic imide formation via O-alkylation of secondary amides under basic conditions, see for example: Wang, X.; Gross, P. H. J. Org. Chem. 1995, 60, 1201.
    • (1995) J. Org. Chem. , vol.60 , pp. 1201
    • Wang, X.1    Gross, P.H.2
  • 24
    • 70449343802 scopus 로고    scopus 로고
    • Both bis-tosylate and the unreacted diol go through the rsteps of the synthesis unchanged and can be removed when the HCl salt of the product 1 is prepared
    • Both bis-tosylate and the unreacted diol go through the rsteps of the synthesis unchanged and can be removed when the HCl salt of the product 1 is prepared.
  • 25
    • 70449417144 scopus 로고    scopus 로고
    • Alternative approaches involving conversion of diol 6 to the terminal epoxide 8 via Mitsunobu protocol or sequential treatment with trimethyl orthoacetate, acetyl bromide, and base were explored and found to be less efficient
    • Alternative approaches involving conversion of diol 6 to the terminal epoxide 8 via Mitsunobu protocol or sequential treatment with trimethyl orthoacetate, acetyl bromide, and base were explored and found to be less efficient.
  • 27
    • 70449417143 scopus 로고    scopus 로고
    • 3N, albeit at the expense of selectivity (1.7:1 ratio of 16 and 1 after NaOH treatment)
    • The corresponding cyclic carbonate could also be formed from amidine diol 10 by treatment with triphosgene. However, its intramolecular ring opening-ring closing proceeded much slower and was incomplete even after 1.5 h at 40 °C, with a 4:1 ratio of 16 and 1 observed after basic hydrolysis. The reaction could be accelerated and driven to completion by the addition of Et3N, albeit at the expense of selectivity (1.7:1 ratio of 16 and 1 after NaOH treatment).
  • 30
    • 70449419207 scopus 로고    scopus 로고
    • Optimization of preparation of 1 was finalized after the first kilo-lab campaign, in preparation for the second one. The project was deprioritized before the second campaign. Optimized lab-scale demorun procedure is described
    • Optimization of preparation of 1 was finalized after the first kilo-lab campaign, in preparation for the second one. The project was deprioritized before the second campaign. Optimized lab-scale demorun procedure is described.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.