Draw a stepwise mechanism for the following transformation, using curved arrows to show the movement of electrons at each step. The reaction is xylan to D-xylose with added HCl, H2O, and heat.

Q: Devise a synthesis of each compound using acetone [(CH3)2C=O] as the only source of carbon atoms.…

A:

Q: One step in the synthesis of sitaglipitin (Problem 17.14, a drug used to treat type 2 diabetes)…

A:

Q: Draw a stepwise mechanism for the following reaction.

A:

Q: 2-Pentylcinnamaldehyde, commonly called flosal, is a perfume ingredient with a jasmine-like odor.…

A:

Q: During the metabolism of glucose, glyceraldehyde 3-phosphate is converted to dihydroxyacetone…

A: Keto –enol tautomerizations means the chemical equilibrium between enol form and keto form. Keto…

Q: Complete the reaction and draw: Acetophenone reacts with phenylmagnesiumbromide in presence of H2O…

A: Given reaction condition: Acetophenone reacts with phenylmagnesiumbromide in presence of H2O and…

Q: Cyclopentylnitrile is reduced with LİAIH4 and the resulting product reacts with…

A: Structure of Cyclopentylnitrile is as follows:-         LiAlH4 is Lithium Aluminium Hydride and it…

Q: Devise a synthesis of each compound from CH3CH2CH2CO2Et, benzene, and alcohols having ≤ 2 C's. You…

A: EXPLANATION: part a) First compound synthesis: In First step, there is conversion of benzene to…

Q: Draw the product formed from ring-closing metathesis of each compound.

A: The ring closing metathesis (RCM) by Grubbs catalyst occurs, when the starting material is diene.…

Q: Draw the product formed from the ring-closing metathesis of each compound. Then, devise a synthesis…

A: (a) The given compound is a diene. The ring-closing metathesis (RCM) by Grubbs catalyst occurs, when…

Q: Draw a stepwise mechanism for the following reaction. (Hint: Two Michael reactions are needed.)

A: Given reaction:

Q: Aniline is oxidized and then resulting product is boiled with Conc. HNO3 and conc. H2SO4c

A:

Q: In addition to using CHX3 and base to synthesize dihalocarbenes (Section 26.4), dichlorocarbene…

A: The molecule contains neutral carbon-atom and if neutral C-atom carrying two valence electrons then…

Q: Draw the product formed from the ring-closing metathesis of each compound. Then, devise a synthesis…

A: (a) The given compound is a diene. The ring-closing metathesis (RCM) by Grubbs catalyst occurs, when…

Q: Uridine monophosphate (UMP) is one of the four nucleotides that compose RNA, the nucleic acid that…

A: The stepwise mechanism for the SN1 reaction has to be drawn.

Q: Identify the lettered compounds in each reaction sequence.Draw the product formed when…

A: Grignard reagent acts as a nucleophile whereas the C of CO is an electrophilic centre.

Q: Usually the keto form of a molecule is more stable than the enol form, for the following three…

A: keto form of compound which are showing tautomerize to form enol

Q: β-D-Glucose, a hemiacetal, can be converted to a mixture of acetals on treatment with CH3OH in the…

A: A stepwise mechanism for this reaction has to be drawn. The reason two acetals are formed from a…

Q: 2-Pentylcinnamaldehyde, commonly called osal, is a perfume ingredient with a jasmine-like odor.…

A: Please find below the reaction mechanism.

Q: Devise a synthesis of attached compound from CH3CH2OH as the only organic starting material; that…

A: Hex-3-yne reacts with H2 lindlar's catalyst to form (z)-hex-3-ene (cis alkene). (Z)-hex-3-ene…

Q: Identify the lettered compounds in each reaction sequence.Draw the product formed when…

A: Intermediate that formed when C6H5CH2CN is treated with the DIBAL-H is;

Q: Draw compounds B and C from the following reaction scheme. excess CH3I Ag20, H20 heat A B

A: In presence of excess of CH3I followed by oxidation by silver oxide, amines undergo Hoffmann…

Q: What is the expression for the solubility product constant, Ksp, of calcium phosphate, Ca3(PO4)2…

A: Solubility product constant (Ksp); When a slightly soluble ionic compound is mixed with water,…

Q: Dimethyl cyclopropanes can be prepared by the reaction of an α, β-unsaturated carbonyl compound X…

A:

Q: β-D-Glucose, a hemiacetal, can be converted to a mixture of acetals on treatment with CH3OH in the…

A: Mechanism of this reaction is as follows:

Q: Draw the organic products formed in each reaction.

A: The starting reactant is valine which is an amino acid. This was treated with acetic anhydride and…

Q: Draw a stepwise mechanism for the following reaction. The four-membered ring in the starting…

A: The four membraned ring in the starting material and product is called as beta-lactum ring. DBN is a…

Reactions at the Alpha Carbon Atom

The position next to the ketone or aldehyde functional group is termed as alpha position and the reaction which occurs at alpha position is called alpha substitution reaction. In an alpha substitution reaction, the alpha proton atom is substituted by an electrophile by the formation of an enol intermediate or enolate ion intermediate. Most of the carbonyl compounds go through an alpha substitution reaction.