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Intermediate in a useful synthesis of 4,4-dialkyl-2-butenolides, based on reaction with two moles of Grignard reagent, followed by cycloreversion (elimination of furan) to release the double bond.
Anna Pachuta-Stec; Jolanta Rzymowska; Liliana Mazur; Ewaryst Mendyk; Monika Pitucha; Zofia Rzączyńska. Synthesis, structure elucidation and antitumour activity of N-substituted amides of 3-(3-ethylthio-1,2,4-triazol-5-yl)propenoic acid. European Journal of Medicinal Chemistry. 1988, 44, (9), 3788-3793.
Hui Chi Huang; Chin I Lin; Abraham K Joseph; Yu Der Lee. Photo-lithographically impregnated and molecularly imprinted polymer thin film for biosensor applications. Journal of Chromatography A. 2004, 1027, (1-2), 263-268.
Intermediate in a useful synthesis of 4,4-dialkyl-2-butenolides, based on reaction with two moles of Grignard reagent, followed by cycloreversion (elimination of furan) to release the double bond: J. Org. Chem., 47, 3953 (1982); Tetrahedron Lett., 24,1929 (1983):
For a review of cycloreversion reactions in organic synthesis, see: Synthesis, 121 (1985).
Dichiarazioni di rischio (UE): H315-H319-H335
Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.
Dichiarazioni precauzionali: P261-P280a-P305+P351+P338-P304+P340-P405-P501a
Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves and eye/face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.