Concept explainers
Videos
Practice Problem G.1
When farnesol is treated with sulfuric acid, it is converted to bisabolene. Outline a possible mechanism for this reaction.
Interpretation:
The mechanism for the formation of Bisabolene from Farnesol in presence of 
is to be outlined.
Concept introduction:
Farnesol is a compound that is formed from isoprene compounds. In general, when geranyl pyrophosphate reacts with isopenenyl pyrophosphate, farnesyl pyrophosphate (intermediate for the synthesis of sesquiterpenes) is formed. This, on oxidation can give farnesol.
Concentrated sulfuric acid acts as a strong dehydrating agent and removes the water molecule from alcohols to form unsaturated hydrocarbon.
Answer to Problem 1PP
Solution:
The mechanism for the synthesis of Bisabolene is explained as follows:
Explanation of Solution
During the first step, Farnesol (unsaturated alcohol) reacts with acid (HA = 
) to form a hydrated product. Then, the hydrated product formed loses one water molecule to form a carbocation. Consequently, this carbocation rearranges to form a more stable carbocation. At last, the base 
( 
) abstracts the hydrogen ion from the molecule, forming Bisabolene.
The whole mechanism can be depicted as:
Hence, Bisabolene has been formed from Farnesol in the presence of concentrated sulfuric acid.
The Bisabolene has been synthesized from Farnesol in the presence of concentrated sulfuric acid. The mechanism for the synthesis of Bisabolene is outlined as:
Want to see more full solutions like this?
Chapter G Solutions
Organic Chemistry
Additional Science Textbook Solutions
Cosmic Perspective Fundamentals
Principles of Anatomy and Physiology
Human Physiology: An Integrated Approach (8th Edition)
Chemistry: A Molecular Approach (4th Edition)
Genetic Analysis: An Integrated Approach (3rd Edition)
- PROBLEM Predict the product(s) and propose a mechanism for each of the following reactions: 19-31 (a) (b) + HO H+ catalyst + OH HO OH H+ catalystarrow_forwardOChem Question: Starting with propyne and using any other required reagents, show how you would synthesize (2R, 3R)- and (2S, 3S)-2,3-dibromobutane (as a racemic form)arrow_forwardusing any necessary reactants and reagents, propose reasonable syntheses of the following compounds from cyclohexanone can you please help with coumpound 3 (I attached it below). Thank you!arrow_forward
Organic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage Learning