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Volumn 76, Issue 5, 2011, Pages 1436-1439

Preparative scale synthesis of the biaryl core of anacetrapib via a ruthenium-catalyzed direct arylation reaction: Unexpected effect of solvent impurity on the arylation reaction

Author keywords

[No Author keywords available]

Indexed keywords

ARYLATION REACTIONS; ARYLATIONS; CHROMATOGRAPHY-FREE SYNTHESIS; COCATALYST;

EID: 79952128821     PISSN: 00223263     EISSN: 15206904     Source Type: Journal    
DOI: 10.1021/jo1018574     Document Type: Article
Times cited : (97)

References (57)
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    • pfizer entered a phase III clinical study with Torcetrapib. This study was halted in 2006 because of elevated blood pressure. Initial studies revealed that Anacetrapib could elevate HDL with no effect on blood pressure.
    • Pfizer entered a phase III clinical study with Torcetrapib. This study was halted in 2006 because of elevated blood pressure. Initial studies revealed that Anacetrapib could elevate HDL with no effect on blood pressure.
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    • For examples of copper-contaminated Fe-catalyzed cross-coupling reactions, see
    • For examples of copper-contaminated Fe-catalyzed cross-coupling reactions, see: Buchwald, S. L.; Bolm, C. Angew. Chem., Int. Ed. 2009, 48, 5586
    • (2009) Angew. Chem., Int. Ed. , vol.48 , pp. 5586
    • Buchwald, S.L.1    Bolm, C.2
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    • The bis-addition product formed could easily be removed by fractional distillation to provide a highly enriched mixture of isomer 6.
    • The bis-addition product formed could easily be removed by fractional distillation to provide a highly enriched mixture of isomer 6.
  • 28
    • 79952145782 scopus 로고    scopus 로고
    • After fractional distillation (90 °C, 3-5 Torr), the isomeric ratio was 18.5:1 (6: 7) with 0.48% 1-bromo-2,4-dimethoxybenzene. These impurities were rejected during the crystallization of acylated product 8.
    • After fractional distillation (90 °C, 3-5 Torr), the isomeric ratio was 18.5:1 (6: 7) with 0.48% 1-bromo-2,4-dimethoxybenzene. These impurities were rejected during the crystallization of acylated product 8.
  • 29
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    • 4 were tried without success.
    • 4 were tried without success.
  • 31
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    • On a 1 mmol scale, >90% conversion was observed, and the reaction profile was slightly cleaner when NMP was used.
    • On a 1 mmol scale, >90% conversion was observed, and the reaction profile was slightly cleaner when NMP was used.
  • 32
    • 79952158392 scopus 로고    scopus 로고
    • These studies were conducted on a 5-10 g scale.
    • These studies were conducted on a 5-10 g scale.
  • 33
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    • Butyrolactone is a common impurity found in NMP.
    • γ-Butyrolactone is a common impurity found in NMP.
  • 34
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    • Other additives such as TFA, pivalic acid, and 4-methylbenzoic acid were tested and were found to have a favorable effect on the reaction efficiency.
    • Other additives such as TFA, pivalic acid, and 4-methylbenzoic acid were tested and were found to have a favorable effect on the reaction efficiency.
  • 35
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    • For a recent review on metal-catalyzed direct arylation, see:; In;, Ed.; Wiley-VCH: Weinheim, Germany,; pp -399. For selected examples of reactions developed in NMP, see
    • For a recent review on metal-catalyzed direct arylation, see: Ackermann, L.; Vivente, R. In Modern Arylation Methods; Ackermann, L., Ed.; Wiley-VCH: Weinheim, Germany, 2009; pp 311 -399. For selected examples of reactions developed in NMP, see
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    • Ackermann, L.1    Vivente, R.2    Ackermann, L.3
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    • For completion of the synthesis of Anacetrapib, see:; PCT Int. Appl. WO 2007/005572.
    • For completion of the synthesis of Anacetrapib, see: Miller, R. A.; Cote, A. S. PCT Int. Appl. WO 2007/005572, 2007.
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    • Miller, R.A.1    Cote, A.S.2


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.