Chapter 21: 23P (page 817)
What 1° amine and carbonyl compound are needed to prepare each imine?
a.
b.
Short Answer
a.
b.
Chapter 21: 23P (page 817)
What 1° amine and carbonyl compound are needed to prepare each imine?
a.
b.
a.
b.
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Get started for freeAn unknown compound C of molecular formula C6H12O3 exhibits a strong absorption in its IR spectrum at 1718 cm-1 and the given 1H NMR spectrum. What is the structure of C?
What carbonyl compound and diol are needed to prepare each compound?
a.
b.
Reaction of 5,5-dimethoxypentan-2-one with methylmagnesium iodide followed by treatment with aqueous acid forms cyclic hemiacetal Y. Draw a stepwise mechanism that illustrates how Y is formed
Besides the tert-butyldimethylsilyl ethers introduced in Chapter 20, there are many other widely used alcohol protecting groups. For example, an alcohol such as cyclohexanol can be converted to a methoxy methyl ether (a MOM protecting group) by treatment with base and chloromethyl methyl ether, . The protecting group can be removed by treatment with aqueous acid.
a. Write a stepwise mechanism for the formation of a MOM ether from cyclohexanol.
b. What functional group comprises a MOM ether?
c. Besides cyclohexanol, what other products are formed by aqueous hydrolysis of the MOM ether? Draw a stepwise mechanism that accounts for formation of each product.
Draw all stereoisomers formed in each reaction.
a.
b.
c.
d.
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