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Volumn , Issue 14, 2009, Pages 2253-2256

Copper-mediated N-arylation of quinazolinediones

Author keywords

Arylation; Boronic; Copper; Cross coupling; Heterocycle

Indexed keywords

BORONIC ACID DERIVATIVE; COPPER; PALLADIUM; QUINAZOLINE DERIVATIVE;

EID: 69249102659     PISSN: 09365214     EISSN: 14372096     Source Type: Journal    
DOI: 10.1055/s-0029-1217724     Document Type: Article
Times cited : (15)

References (30)
  • 26
    • 69249095258 scopus 로고    scopus 로고
    • A regiochemically controlled synthesis of quinazolinedione 3 was carried out using the route outlined in Scheme 1 (disconnection a). The material so obtained was spectroscopically identical to that generated by direct arylation of 1, confirming that the regiochemistry of substitution was limited to the free nitrogen position and not either of the available carbonyl oxygens.
    • A regiochemically controlled synthesis of quinazolinedione 3 was carried out using the route outlined in Scheme 1 (disconnection a). The material so obtained was spectroscopically identical to that generated by direct arylation of 1, confirming that the regiochemistry of substitution was limited to the free nitrogen position and not either of the available carbonyl oxygens.
  • 28
    • 69249090026 scopus 로고    scopus 로고
    • Typical Procedure 3-Methylquinazoline-2,4 (1H,3H, dione (200 mg, 1.14 mmol, 4-methoxyphenylboronic acid (345 mg, 2.27 mmol, Cu(OAc)2 (412 mg, 2.27 mmol, and Et3N (0.316 mL, 2.27 mmol) were suspended in CH2Cl2 (12 mL) along with 200 mg of activated 4 Å MS. The suspension was allowed to stir at r.t. for 20 h then partitioned between 1 M HCl (50 mL) and EtOAc (50 mL, The organic layer was isolated, dried (MgSO4, and concentrated in vacuo, and the residue was purified by flash chromatography (15% EtOAc-i-hexane) to furnish 1-(4-methoxyphenyl)-3-methylquinazoline-2,4-(1H,3H)-dione (4) as a colourless solid (230 mg, 72, 1H NMR (400 MHz, CDCl3, δ, 8.1-8.4 (m, 1 H, 7.4-7.6 (m, 1 H, 7.1-7.3 (m, 3 H, 7.0-7.2 (d, 2 H, 6.59 (d, 1 H, 3.89 (s, 3 H, 3.52 (s, 3 H, 13C NMR 100 MHz, CDCl3, δ, 162.2, 159.9, 151.2, 141.7, 134.5, 129
    • +.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.