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6. What is the Wittig reaction. Show the course of the reaction by using triphenylphosphin, methylbromide,...

6. What is the Wittig reaction. Show the course of the reaction by using triphenylphosphin, methylbromide, as a starting materials, PhLi as base and benzaldehyde as the carbonyl component (15 points). Draw all intermediates, products, and special conditions where needed.
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