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Bromolactonization occurs with TMS bromide in the presence of N-ethyldiisopropylamine in DMSO to give a bridged bicyclic lactone: Heterocycles, 31, 987 (1990):/n
For Pd catalyzed lactonization in the presence of oxygen, giving a mixture of [3.2.1] and [2.2.2] bicyclic unsaturated lactones, see: J. Org. Chem., 60, 5298 (1995)./n
Gefahrenhinweise (EU): H303-H312-H314-H318
May be harmful if swallowed. Harmful in contact with skin. Causes severe skin burns and eye damage. Causes serious eye damage.
Do not breathe dusts or mists. IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.