Chapter20: Carboxylic Acids And Nitriles
Section20.SE: Something Extra
Problem 40AP: Thioglycolic acid, HSCH2CO2H, a substance used in depilatory agents (hair removers) has pKa = 3.42....
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Aside from the specified main starting material, only the following compounds can be used as sources of the carbon backbone for the target compound:
acetaldehyde |
ethanol |
propanoic acid |
acetic acid |
ethyl bromoacetate |
propan-1-ol |
benzene |
(2E,4E)-hexa-2,4-diene |
propan-2-ol |
buta-1,3-diene |
methanol |
propan-2-one (acetone) |
(chloromethyl)benzene (benzyl chloride) |
5-methyloxolan-2-one |
sodium cyanide |
1-(chloromethyl)-4-methylbenzene |
phenylacetaldehyde |
sodium methoxide |
diethyl propanedioate (diethyl malonate) |
piperidine |
sodium ethoxide |
- There are no restrictions with regards to the use of other reagents such as catalysts, solvents, redox agents, protection/deprotection agents, etc. as long as they will not be used as sources of carbon for the skeleton of the target compound.
- Design a retrosynthetic map and from it, propose a multi-step synthetic approach for the preparation of the target compound from the specified starting material.
- Write both the retrosynthesis and synthesis plan with brief explanation

Transcribed Image Text:Target compound:
Main starting material:
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