4.Sulfur ylides react with aldehydes and ketones, but a different product is formed than with aphosphorous ylide. Provide a mechanism for the reaction below.(CH3)3S^ CH2 → The Wittig reaction can be used for the synthesis of conjugated dienes as the example below,1-phenyl-penta-1, 3-diene. Propose two different sets of reagents that could be combined ina Wittig reaction to give 1-phenyl-1,3-pentadiene.
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The Wittig reaction enables the conversion of aldehydes and ketones into alkenes via reaction with phosphonium ylides, forming C=C bonds with defined stereochemistry. Developed by Georg Wittig, who was awarded the 1979 Nobel Prize in Chemistry, the reaction proceeds through betaine and oxaphosphetane intermediates, followed by elimination of triphenylphosphine oxide to yield the alkene. Learn. Review. Repeat.
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