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Ethyl 4-bromocrotonate is an important raw material and intermediate used in Organic Synthesis, Pharmaceuticals, Agrochemicals and Dyestuffs.
E. Ghera; Y. Ben-David. Reactions of sulfur-containing carbanions with ethyl 4-bromocrotonate. A facile synthesis of cyclopropanecarboxylates. Tetrahedron Letters. 1979, 20 4603-4606.
Reformatsky-type reactions can occur with or without allylic rearrangement: Liebigs Ann. Chem., 709, 29 (1967); Chem. Lett., 161 (1982); Synthesis, 305 (1990).
Reacts with sulfur-stabilized carbanions, e.g. from Benzyl phenyl sulfone, L04201, by conjugate addition with concomitant displacement of Br-, to give cyclopropane esters: Tetrahedron Lett., 4603 (1979):
Hazard Statements: H314-H335
Causes severe skin burns and eye damage. May cause respiratory irritation.
Precautionary Statements: P260-P264b-P271-P280-P301+P330+P331-P303+P361+P353-P304+P340-P305+P351+P338-P310-P363-P501c
Do not breathe dust/fume/gas/mist/vapours/spray. Wash face, hands and any exposed skin thoroughly after handling Use only outdoors or in a well-ventilated area. Wear protective gloves/protective clothing/eye protection/face protection. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a POISON CENTER or doctor/physician. Wash contaminated clothing before reuse. Dispose of contents/ container to an approved waste disposal plant