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- 2) How would you synthesize the following compounds from cyclohexanone? CH₂Br A Br B CH₂C6H5 D CH2CH2CO2Hlodify the structure of the compound provided to show the skeletal structure of the product that forms when this compound is treated with K₂Cr₂O7. No reaction occurs. OH CHO X Ś my è +12:04 PM Tue Apr 25 < S T List the reagents to achieve the synthesis o-oi حمد он ●●● Ď 78% + : 1 1 2 (+)
- Melamine, used as a fire retardant and a component of the writing surface of white boards, can be prepared from s-trichlorotriazine through a series of SNAr reactions with ammonia. The first substitution takes place rapidly at room temperature. The second substitution takes place near 100 °C, and the third substitution requires even higher temperature and pressure. Provide an explanation fatr this reactivity.A step in a synthesis of PGE1 (prostaglandin E1, alprostadil) is the reaction of a trisubstituted cyclohexene with bromine to form a bromolactone. Propose a mechanism for formation of this bromolactone and account for the observed stereochemistry of each substituent on the cyclohexane ring. Alprostadil is used as a temporary therapy for infants born with congenital heart defects that restrict pulmonary blood flow. It brings about dilation of the ductus arteriosus, which in turn increases blood flow in the lungs and blood oxygenation.Aldehydes and ketones react with thiols to yield thioacetals just as they react with alcohols to yield acetals. Predict the product of the following reaction, and propose a mechanism:
- Dihydropyran is synthesized by treating tetrahydrofurfuryl alcohol with an arenesulfonic acid, ArSO3H. Propose a mechanism for this conversion.Nonconjugated , -unsaturated ketones, such as 3-cyclohexenone, are in an acid-catalyzed equilibrium with their conjugated , -unsaturated isomers. Propose a mechanism for this isomerization.The key step in a reported laboratory synthesis of sativene, a hydrocarbon isolated from the mold Helminthosporium sativum, involves the following base treatment of a keto tosylate. What kind of reaction is occurring? How would you complete the synthesis?
- Cyclohexene can be converted to 1-cyclopentenecarbaldehyde by the following series of reactions. Propose a structural formula for each intermediate compound.Identify the major and minor product(s) of the following reaction: of Br NaOEt ? ELOHTreatment of (CH3)2CHCH(OH)CH2CH3 with TsOH affords two products (M and N) with molecular formula C6H12. The 1H NMR spectra of M and N are given below. Propose structures for M and N, and draw a mechanism to explain their formation.
