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Q: Devise a synthesis of each compound from benzene. You may use any other organic or in organic…
A: (a)
All given 3 reactions are addition of Gilman reagent on conjugate ketone or aldehyde.
This addition is also known as conjugate addition or 1,4 addition
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- Bromoetherification, the addition of the elements of Br and OR to adouble bond, is a common method for constructing rings containingoxygen atoms. This reaction has been used in the synthesis of thepolyether antibiotic monensin (Problem 18.34). Draw a stepwisemechanism for the following intramolecular bromoetherification reaction.Salsolinol is a naturally occurring compound found in bananas,chocolate, and several foods derived from plant sources. Salsolinol isalso formed in the body when acetaldehyde, an oxidation product of theethanol ingested in an alcoholic beverage, reacts with dopamine, aneurotransmitter. Draw a stepwise mechanism for the formation ofsalsolinol in the following reaction.Devise a synthesis of each compound from benzene. You may also useany organic compounds having four or fewer carbons and any requiredinorganic reagents.
- Devise a stepwise synthesis of attached compound from dicyclopentadiene using a Diels–Alder reaction as one step. You may also use organic compounds having ≤ 4 C's, and any required organic or inorganicreagents.Identify F in the following reaction sequence. F was converted in several steps to the antidepressant paroxetine (trade name Paxil; see also Problem 9.9).Devise 2 synthesis for the given compound starting from BENZENE and other pertinent inorganic or organic reagents.
- susceptible to nucleophilic attack a to b c only a only a and cDraw a stepwise mechanism for the following Robinson annulation. This reaction was a key step in a synthesis of the steroid cortisone by R. B. Woodward and co-workers at Harvard University in 1951.can you solve 12.66. Devise a synthesis of A from the three strating materials given. You may use any other needed organic or inorganic reagents
- Slow addition of organolithium reagent A to B afforded C, anintermediate in the synthesis of the chapter-opening molecule,resiniferatoxin. Draw a stepwise mechanism for this process.Reaction of a sulfonitric mixture witha) a terminal alkyneb) a non-terminal alkyneInterestingly, reduction of the complex shown above mostly gives thealcohol enantiomer shown below after workup. a. Draw the other minor diastereomeric alcohol product. b. Briefly explain the diastereoselectivity of the reduction – why is oneenantiomer heavily favored? Draw a structure or structures to support youranswer.