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Date: 31-7-2019
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Date: 17-8-2019
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Date: 2-8-2019
1336
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Another important reaction exhibited by organometallic reagents is metal exchange. Organolithium reagents react with cuprous iodide to give a lithium dimethylcopper reagent, which is referred to as a Gilman reagent. Gilman reagents are a source of carbanion like nucleophiles similar to Grignard and Organo lithium reagents. However, the reactivity of organocuprate reagents is slightly different and this difference will be exploited in different situations. In the case of α, β unsaturated carbonyls organocuprate reagents allow for an 1,4 addition of an alkyl group. As we will see later Grignard and Organolithium reagents add alkyl groups 1,2 to α, β unsaturated carbonyls
Organocuprate reagents are made from the reaction of organolithium reagents and CuI
This acts as a source of R:-
Example
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لصحة القلب والأمعاء.. 8 أطعمة لا غنى عنها
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حل سحري لخلايا البيروفسكايت الشمسية.. يرفع كفاءتها إلى 26%
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جامعة الكفيل تحتفي بذكرى ولادة الإمام محمد الجواد (عليه السلام)
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