Could you show the mechanism for Question 4, parts A-C? phenyl groups, they already start with 18 C's - so Wittig reagents may have 20 totalcarbons, at most).a. Think Backwards: Imines come from ketones or aldehydes.... Need to build 2-butanone from two-carbon sources...MgBrorHH HPH3P=CHCH3HHOHeMgBrHOH1. BH32. NaOH,H₂O₂The alkene is symmetrical. Hydroboration, oxymercuration or acid-catalyzed hydrationall work for step two.PCCb. Enamines come from ketones or aldehydes. Need to add two carbons to both sidesof the ketone...PCCIor in this version, just use a Wittig reagent...OOHMgBrOHPOCI 3pyridinePCCPCCXc. Need to form 3-pentanone, then add two more carbons and institute the doublebond.... In this answer, we will dehydrate a symmetrical alcohol...OHMgBrPCCMgBrOHNH3H*MgBrNH(CH3)2, H*NHIMgBrMgBrPh3P=CHCH3NH3H*OHPCCOHPCCNHçoğça foPCC 3. Construct the following compounds using only the following carbon sources andwhatever other inorganic reagents (oxidants, reducing agents, etc): formaldehyde,acetaldehyde, acetone, 1-butanol.a. 4 Carbons becoming 5 Carbons - Need to add one more carbon (must be usingformaldehyde)... Thinking backwards - Alcohols form from Grignards reacting withaldehydes... Need to make a Grignard...PBr3H&HOHНО.OHBrb. 4 Carbons becoming 6 Carbons - Need to add two more carbons (must be usingacetaldehyde). Thinking backwards - Chlorides come from alcohols, alcohols come fromGrignards with aldehydes... Need a four carbon Grignard...PBr3MgPBr3BrMgBrMgBrMgCIc. 4 Carbons becoming 7 Carbons - Need to add three more carbons (must be usingacetone). Thinking backwards - Alkenes come from the dehydration of alcohols, alcoholscome from Grignards with ketones... Need a four carbon Grignard...BrMg.MgBr HOHOHOHSOCI₂,pyridine{d}POCI3pyridinemore than4. For the following compounds, construct them from reagents containing notwo carbons (with the exception of any Wittig reagent you would like to use with three

Solution: For any organic transformation we must have know about the nature of reagent. Grignard…

phenyl groups, they already start with 18 C's - so Wittig reagents may have 20 total carbons, at most). a. Think Backwards: Imines come from ketones or aldehydes..... Need to build 2- butanone from two-carbon sources... O OH NH

phenyl groups, they already start with 18 C's - so Wittig reagents may have 20 total carbons, at most). a. Think Backwards: Imines come from ketones or aldehydes..... Need to build 2- butanone from two-carbon sources... O OH NH

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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