A CHEM 245 student attempts the following reaction to synthesize the desired ether below, but he is unsuccessful: 2. H2SO4, CH3OH OCH3 desired ether racemic mixture (a) Use what you have learned in CHEM 241 to predict the structure of the major product he did collect: H2SO4, CH3OH (only one stereoisomer required) (b) Propose a reaction sequence that would be more likely to provide him with the desired ether product: OCH3 desired ether racemic mixture 3. Write out a complete mechanism for the reaction below: CH3 H3C H. CH3 H H Mechanism:

A CHEM 245 student attempts the following reaction to synthesize the desired ether below, but he is unsuccessful: 2. H2SO4, CH3OH OCH3 desired ether racemic mixture (a) Use what you have learned in CHEM 241 to predict the structure of the major product he did collect: H2SO4, CH3OH (only one stereoisomer required) (b) Propose a reaction sequence that would be more likely to provide him with the desired ether product: OCH3 desired ether racemic mixture 3. Write out a complete mechanism for the reaction below: CH3 H3C H. CH3 H H Mechanism:

Organic Chemistry

8th Edition

ISBN:9781305580350

Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Chapter20: Dienes, Conjugated Systems, And Pericyclic Reactions

Section: Chapter Questions

Problem 20.50P

See similar textbooks

Similar questions

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.
All rearrangements we have discussed so far have involved generation of an electron-deficient carbon followed by a 1,2-shift of an atom or a group of atoms from an adjacent atom to the electron-deficient carbon. Rearrangements by a 1,2-shift can also occur following the generation of an electron-deficient oxygen. Propose a mechanism for the acid-catalyzed rearrangement of cumene hydroperoxide to phenol and acetone.
Alcohols are important for organic synthesis, especially in situations involving alkenes. The alcohol might be the desired product, or the OH group might be transformed into another functional group via halogenation, oxidation, or perhaps conversion to a sulfonic ester derivative. Formation of an alcohol from an alkene is particularly powerful because conditions can be chosen to produce either the Markovnikov or non-Markovnikov product from an unsymmetrical alkene. Using your reaction roadmap as a guide, show how to convert 4-methyl-1-pentene into 5-methylhexanenitrile. You must use 4-methyl-1-pentene and sodium cyanide as the source of all carbon atoms in the target molecule. Show all reagents needed and all molecules synthesized along the way.
Nonconjugated , -unsaturated ketones, such as 3-cyclohexenone, are in an acid-catalyzed equilibrium with their conjugated , -unsaturated isomers. Propose a mechanism for this isomerization.
When cis-2-decalone is dissolved in ether containing a trace of HCl, an equilibrium is established with trans-2-decalone. The latter ketone predominates in the equilibrium mixture. Propose a mechanism for this isomerization and account for the fact that the trans isomer predominates at equilibrium.
Draw a structural formula for the major organic product of each reaction and specify the most likely mechanism by which each is formed. (g) CH3CH2ONa++CH2=CHCH2Clethanol
Following is the structure of miconazole, the active antifungal agent in a number of over-the-counter preparations, including Monistat, that are used to treat vaginal yeast infections. One of the compounds needed for the synthesis of miconazole is the trichloro derivative of toluene shown on its right. (a) Show how this derivative can be synthesized from toluene. (b) How many stereoisomers are possible for miconazole?
Provide the structure(s) of the expected major organic product of the reaction shown. 1) Disiamylborane 2) H₂O₂, NaOH OI O II ||| O IV OV CH3CH₂C(CH3)2C=CH OH OH xx xo IV
Treatment of (CH3)2CHCH(OH)CH2CH3 with TsOH affords two products(M and N) with molecular formula C6H12. The 1H NMR spectra of M and Nare given below. Propose structures for M and N, and draw a mechanismto explain their formation.
Treatment 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.
3) Predict the product for the following reaction. (CH3)2CHOH
: Treatment of (CHa)CHCH(OH)CH,CH3 with TSOH affords two products (M and N) with molecular formula CgH12. The 'H NMR spectra of M and N are given below. Propose structures for M and N and draw a mechanism to explain their formation. 1H NMR of M 3H 1H NMR of N 3H 3H 3 H 1H 3 H 2 H 2H 2H 8 7 6 4 1 0 9 8. 2 1 ppm ppm 4.