Reaction Between Grignard Reagent and Amide:<\/h3>\n\n\n\n
Grignard reagents do not effectively react with amides<\/strong> to form alcohols because amides are relatively unreactive towards nucleophilic attack due to resonance stabilization of the carbonyl group. Additionally, the nitrogen atom of the amide has a lone pair that delocalizes into the carbonyl, reducing its electrophilicity.<\/p>\n\n\n\n If a Grignard reagent is added to an amide, it can act as a strong base and deprotonate the amide nitrogen, but the typical nucleophilic addition to form an alcohol does not proceed efficiently. Excess Grignard reagent and harsh conditions can sometimes lead to over-addition, producing tertiary amines, but this is not a straightforward reaction and is generally avoided in standard organic synthesis.<\/p>\n\n\n\n Grignard reagents readily react with acid anhydrides to form tertiary alcohols after hydrolysis. The reaction proceeds in two steps:<\/p>\n\n\n\n Step 1<\/strong>: The Grignard reagent attacks one of the carbonyl carbons of the anhydride, leading to the formation of a ketone intermediate and a carboxylate ion. General Reaction Example<\/strong>: Step 1<\/strong>: Step 2<\/strong>: After hydrolysis: Thus, the final product is a tertiary alcohol.<\/p>\n\n\n\n What is the reaction between Grignard reagent and amide Grignard reagent and anhydride The Correct Answer and Explanation is: Reaction Between Grignard Reagent and Amide: Grignard reagents do not effectively react with amides to form alcohols because amides are relatively unreactive towards nucleophilic attack due to resonance stabilization of the carbonyl group. Additionally, the nitrogen […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-33093","post","type-post","status-publish","format-standard","hentry","category-quiz-questions"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/33093","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/comments?post=33093"}],"version-history":[{"count":1,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/33093\/revisions"}],"predecessor-version":[{"id":33095,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/33093\/revisions\/33095"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=33093"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=33093"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=33093"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Reaction Between Grignard Reagent and Anhydride:<\/h3>\n\n\n\n
Step 2<\/strong>: A second equivalent of the Grignard reagent attacks the newly formed ketone, resulting in an alcohol after aqueous workup.<\/p>\n\n\n\n
Suppose phenyl magnesium bromide (C\u2086H\u2085MgBr) reacts with acetic anhydride (CH\u2083COOCOCH\u2083)<\/p>\n\n\n\n
C\u2086H\u2085MgBr + (CH\u2083CO)\u2082O \u2192 C\u2086H\u2085COCH\u2083 + CH\u2083COO\u207bMgBr\u207a<\/p>\n\n\n\n
C\u2086H\u2085MgBr + C\u2086H\u2085COCH\u2083 \u2192 (C\u2086H\u2085)\u2082C(OMgBr)CH\u2083<\/p>\n\n\n\n
(C\u2086H\u2085)\u2082C(OH)CH\u2083<\/p>\n\n\n\nConclusion:<\/h3>\n\n\n\n
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