메뉴 건너뛰기




Volumn 4, Issue 24, 2002, Pages 4373-4376

Practical synthesis of optically active styrene oxides via reductive transformation of 2-chloroacetophenones with chiral rhodium catalysts

Author keywords

[No Author keywords available]

Indexed keywords

ARTICLE;

EID: 0041736497     PISSN: 15237060     EISSN: None     Source Type: Journal    
DOI: 10.1021/ol020213o     Document Type: Article
Times cited : (123)

References (34)
  • 5
    • 0042325451 scopus 로고
    • EP 386603, 1991
    • (e) Ro40-2148: Alig, L.; Mueller, M. EP 386603, 1991.
    • (1991)
    • Alig, L.1    Mueller, M.2
  • 9
    • 0042325450 scopus 로고
    • EP 0611826A2, 1994
    • (a) Matsuyama, A.; Kobayashi, Y. EP 0611826A2, 1994.
    • (1994)
    • Kobayashi, Y.1
  • 18
    • 0041824510 scopus 로고    scopus 로고
    • 5 in hexane) to give almost quantitatively 2-chlorophenylethanol 3a. The ee value was determined by HPLC analysis. See Supporting Information
    • 5 in hexane) to give almost quantitatively 2-chlorophenylethanol 3a. The ee value was determined by HPLC analysis. See Supporting Information.
  • 28
    • 0032848066 scopus 로고    scopus 로고
    • The asymmetric transfer hydrogenation of 2-chloroacetophenone catalyzed by polymer supported Ru-(S,S)-TsDPEN with formic acid as a hydrogen source in DMF proceeded to give 1-aryl-2-chloro ethanol in 95% ee and with a S/C of 100. (b) Kenny, J. A.; Palmer, M. J.; Smith, A. R. C.; Walsgrove, T.; Wills, M. Synlett 1999, 10, 1615-1617.
    • (1999) Synlett , vol.10 , pp. 1615-1617
    • Kenny, J.A.1    Palmer, M.J.2    Smith, A.R.C.3    Walsgrove, T.4    Wills, M.5
  • 30
    • 0041323912 scopus 로고    scopus 로고
    • One-Pot Procedure for Synthesis of 4a. A mixture of 2-chloroacetophenone 2a (5 mmol) and catalyst 1a (0.005 mmol) in a 5:2 mixture of formic acid to triethylamine (1.0 mL) and 2-propanol (6.0 mL) was stirred at 25°C for 2 h. The reaction mixture was then treated with 2 M NaOH aqueous solution (10.0 mL) at 0°C for 1 h. After the usual workup procedure, (R)-styrene oxide 4a with 96.8% ee was obtained in 83% yield. The ee value was determined by HPLC analysis. In a large-scale experiment. the reaction of 4.73 g of 2a with 1a (S/C = 5000) gave the corresponding optically active styrene oxide with 94% ee in a 93% total isolated yield (3.54 g). Even commercially available reagents and solvents without special purification could be used in this reaction
    • One-Pot Procedure for Synthesis of 4a. A mixture of 2-chloroacetophenone 2a (5 mmol) and catalyst 1a (0.005 mmol) in a 5:2 mixture of formic acid to triethylamine (1.0 mL) and 2-propanol (6.0 mL) was stirred at 25°C for 2 h. The reaction mixture was then treated with 2 M NaOH aqueous solution (10.0 mL) at 0°C for 1 h. After the usual workup procedure, (R)-styrene oxide 4a with 96.8% ee was obtained in 83% yield. The ee value was determined by HPLC analysis. In a large-scale experiment. the reaction of 4.73 g of 2a with 1a (S/C = 5000) gave the corresponding optically active styrene oxide with 94% ee in a 93% total isolated yield (3.54 g). Even commercially available reagents and solvents without special purification could be used in this reaction.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.