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Volumn , Issue 5, 2007, Pages 733-736

Efficient reformatsky conjugate additions to alkylidene malonates and malonamides

Author keywords

Addition reactions; Organometallic reagents; Zinc

Indexed keywords

ALKYLIDENE MALONATE DERIVATIVE; BROMONITRILE; LACTAM DERIVATIVE; MALONAMIDE DERIVATIVE; MALONIC ACID DERIVATIVE; NITRILE; ORGANOMETALLIC COMPOUND; UNCLASSIFIED DRUG; ZINC;

EID: 33947731832     PISSN: 09365214     EISSN: None     Source Type: Journal    
DOI: 10.1055/s-2007-970756     Document Type: Article
Times cited : (6)

References (26)
  • 8
    • 33746593938 scopus 로고
    • Trost, B. M, Fleming, I, Eds, Pergamon: Oxford, Chap. 1.8
    • Rathke, M. W.; Weipert, P. In Comprehensive Organic Synthesis, Vol. 2; Trost, B. M.; Fleming, I., Eds.; Pergamon: Oxford, 1991, Chap. 1.8.
    • (1991) Comprehensive Organic Synthesis , vol.2
    • Rathke, M.W.1    Weipert, P.2
  • 19
    • 33947713208 scopus 로고    scopus 로고
    • Typical Procedure for the Reformatsky Reaction 1-tert-Butyl 3,3-Diethyl 2-methylpropane-1,3,3-tricarboxylate (3) Zinc powder was activated by shaking with a sat. solution of NH4Cl for 5 min, followed by washing with H2O, EtOH, Et2O and then drying under high vacuum at r.t. for 3 h. Thermal Conditions To a suspension of activated zinc (350 mg, 5.4 mmol) in THF (5 mL) were added a few crystals of iodine, followed by tert-butyl 2-bromopropionate (520 mL, 3.2 mmol, The mixture was sonicated at 35-40°C for 15 min. With stirring, diethyl ethylidenemalonate (2, 182 mL, 1.1 mmol) was added and the mixture was sonicated at 35-40°C for 15 min. After 18 h at reflux, the mixture was quenched with a solution of sat. NH4Cl (5 mL) and EtOAc 5 mL, The organic layer was separated, dried over MgSO4, filtered and concentrated under vacuum. The crude material was purified by flash chromatography
    • +.
  • 20
    • 33947732295 scopus 로고    scopus 로고
    • -1 R = 0.0375, wR = 0.0399. The compound was crystallised from EtOAc-PE.
    • -1 R = 0.0375, wR = 0.0399. The compound was crystallised from EtOAc-PE.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.