Furan, 99%, stab. with ca 250ppm BHT

General References:

1. Diels-Alder cycloadditions of furans with reactive dienophiles, followed by dehydration of the resulting 7-oxabicyclo[2.2.1]heptenes generate benzenes, often with unusual substitution patterns; review: Heterocycles, 22, 875 (1984). Adducts of furans with alkynes can be deoxygenated to give aromatics, by reduction with a low-valent Ti reagent: Synthesis, 787 (1984).
2. Lithiation occurs at the 2-position. For the formation of furfuryl propargyl ethers and their subsequent base catalyzed intramolecular Diels-Alder cyclization to isobenzofuran derivatives, see: J. Org. Chem., 60, 6168 (1995). 2,5-Dilithiation can be effected with n-BuLi - TMEDA: J. Chem. Soc., Perkin 1, 887 (1977), or n-BuLi - KO-t-Bu: Synthesis, 316 (1988). A Barbier-type reaction has been reported in which furan is reacted with a lithium carboxylate in the presence of Li metal and t-butyl chloride with sonication: J. Org. Chem., 60, 8 (1995), providing an easy access to 2-furyl ketones.
3. García-Gómez, D.; Bregy, L.; Barrios-Collado, C.; Miguel, G. V.; Zenobi, R. Real-Time High-Resolution Tandem Mass Spectrometry Identifies Furan Derivatives in Exhaled Breath. Anal. Chem. 2015, 87 (13), 6919-6924.
4. Xu, N.; Tang, C.; Meng, X.; Fan, X.; Tian, Z.; Huang, Z. Experimental and Kinetic Study on the Ignition Delay Times of 2,5-Dimethylfuran and the Comparison to 2-Methylfuran and Furan. Energy Fuels 2015, 29 (8), 5372-5381.