Chapter 16: Q16P (page 751)
Question:Can a cyanohydrin be prepared by treating a ketone with sodium cyanide?
Answer
A cyanohydrin can’t be prepared by treating a ketone with sodium cyanide.
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Imines can exist as stereoisomers. The isomers are named using the E, Z system of nomenclature (Section 4.2). The lone pair has the lowest priority.
Draw the structure of each of the following compounds:
a. the (E)-hydrazone of benzaldehyde
b. the (Z)-oxime of propiophenone
Question:Show how each of the following compounds could be prepared from the given starting material. Each requires a protecting group.
Question: Fill in the boxes with the appropriate reagents:
Question: Thiols can be prepared from the reaction of thiourea with an alkyl halide, followed by hydroxide-ion-promoted hydrolysis.
a.Propose a mechanism for the reaction.
b.What thiol will be formed if the alkyl halide employed is pentyl bromide?
When a cyclic ketone reacts with diazomethane, the next larger cyclic ketone is formed. This is called a ring-expansion reaction. Draw a mechanism for the following ring-expansion reaction.
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