메뉴 건너뛰기




Volumn , Issue 2, 2009, Pages 201-204

First synthesis of functionalized benzonitriles by formal [3+3] cyclocondensations of 1,3-bis(silyloxy)buta-1,3-dienes

Author keywords

Arenas; Benzonitriles; Cyclizations; Regioselectivity; Silyl enol ethers

Indexed keywords


EID: 62349138305     PISSN: 09365214     EISSN: 14372096     Source Type: Journal    
DOI: 10.1055/s-0028-1087395     Document Type: Article
Times cited : (3)

References (52)
  • 46
    • 0036200130 scopus 로고    scopus 로고
    • For a review of 1,3-bis(silyloxy)buta-1,3-dienes, see
    • For a review of 1,3-bis(silyloxy)buta-1,3-dienes, see: Langer, P. Synthesis 2002, 441.
    • (2002) Synthesis , pp. 441
    • Langer, P.1
  • 49
    • 62349110605 scopus 로고    scopus 로고
    • Typical Experimental Procedure for the Synthesis of 4a-l To a stirred solution of CH2Cl2 (3 mL per 1.0 mmol of 2a-e) of 2a-e was added 3a-h (1.1 mmol) and, subsequently, TiCl4 (1.1 mmol) at -78°C under argon atmosphere. The temperature of the reaction mixture was allowed to rise to 20°C over 14 h with stirring. To the solution was added HCl (10, 20 mL) and the organic and the aqueous layer were separated. The latter was extracted with CH 2Cl2 (3 x 20 mL, The combined organic layers were dried (Na2SO4, filtered, and the filtrate was concentrated in vacuo. The residue was purified by column chromatography (SiO2, heptanes-EtOAc) to give 4a-l. Starting with 2a (0.209 g, 1.5 mmol) and 3a (0.446 g, 1.65 mmol, 4a was isolated as a colorless solid (101 mg, 33, mp 86-87°C. 1H NMR 250 MHz, CDCl3, δ, 1.39
    • 3: 205.07334; found: 205.073572.
  • 50
    • 62349124922 scopus 로고    scopus 로고
    • CCDC-703181 contains all crystallographic details of this publication and is available free of charge at www.ccdc.cam.ac.uk/conts/retrieving.html or can be ordered from the following address: Cambridge Crystallographic Data Centre, 12 Union Road, Cambridge, CB2 1EZ, UK; fax: +44 (1223)336033; or deposit@ccdc.cam.ac.uk.
    • CCDC-703181 contains all crystallographic details of this publication and is available free of charge at www.ccdc.cam.ac.uk/conts/retrieving.html or can be ordered from the following address: Cambridge Crystallographic Data Centre, 12 Union Road, Cambridge, CB2 1EZ, UK; fax: +44 (1223)336033; or deposit@ccdc.cam.ac.uk.
  • 52
    • 62349120302 scopus 로고    scopus 로고
    • Typical Experimental Procedure for the Synthesis of 6a-f To a CH2Cl2 solution of 5 was added TiCl4 at -78°C in the presence of MS (4 Å, The appropriate bis(silyl enol ether) 3 was subsequently added. The reaction mixture was allowed to warm to 20°C during 20 h and was stirred for further 4 h. To the solution was added CH2Cl2, the MS were removed, and a sat. aq soln of NaHCO3 was added. The organic layer was separated, and the aqueous layer was repeatedly extracted with CH2Cl2. All organic extracts were combined, dried (Na2SO4, and filtered. The filtrate was concentrated in vacuo. The residue was purified by column chromatography (SiO2) to give salicylates 6. Starting with 5 (188 mg, 0.95 mmol, CH2Cl2 (3.0 mL, MS (4 Å, 0.4 g, TiCl4 (0.11 mL, 1.0 mmol, and 3i 356 mg, 1
    • 3 (205.21): C, 64.38; H, 5.40; N, 6.83. Found: C, 64.64; H, 5.52; N, 6.65.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.