Chapter 23, Problem 44PP

(a)

Interpretation Introduction

Interpretation:

With $\text{1-}$ butyne as one reagent, the other reagent required to prepare the given compound via Suzuki coupling should be identified.

Concept Introduction:

Suzuki reaction: It involves coupling of an aryl, a benzyl or vinyl halide with organoborane in presence of ${\text{Pd(PPh}}_{\text{3}}{\text{)}}_{\text{4}}$.

Alkyl boranes are generated by hydroboration of alkynes in presence of reagent namely catecholborane.

Retro synthesis: It is a technique of planning an organic synthesis by the reverse approach. In this technique, the starting materials are obtained by cleaving the target molecule into logical synthons. Synthons are precursor fragments of the target compound when it is cleaved. Depending on the stability, the synthons are classified as logical and illogical synthons. Logical synthons are highly stable precursor fragments, and illogical synthons are less stable precursor fragments of the target compound.

(b)

Interpretation Introduction

Interpretation:

With $\text{1-}$ butyne as one reagent, the other reagent required to prepare the given compound via Suzuki coupling should be identified.

Concept Introduction:

Suzuki reaction: It involves coupling of an aryl, a benzyl or vinyl halide with organoborane in presence of ${\text{Pd(PPh}}_{\text{3}}{\text{)}}_{\text{4}}$.

Alkyl boranes are generated by hydroboration of alkynes in presence of reagent namely catecholborane.

Retro synthesis: It is a technique of planning an organic synthesis by the reverse approach. In this technique, the starting materials are obtained by cleaving the target molecule into logical synthons. Synthons are precursor fragments of the target compound when it is cleaved. Depending on the stability, the synthons are classified as logical and illogical synthons. Logical synthons are highly stable precursor fragments, and illogical synthons are less stable precursor fragments of the target compound.

(c)

Interpretation Introduction

Interpretation:

With $\text{1-}$ butyne as one reagent, the other reagent required to prepare the given compound via Suzuki coupling should be identified.

Concept Introduction:

Suzuki reaction: It involves coupling of an aryl, a benzyl or vinyl halide with organoborane in presence of ${\text{Pd(PPh}}_{\text{3}}{\text{)}}_{\text{4}}$.

Alkyl boranes are generated by hydroboration of alkynes in presence of reagent namely catecholborane.

Retro synthesis: It is a technique of planning an organic synthesis by the reverse approach. In this technique, the starting materials are obtained by cleaving the target molecule into logical synthons. Synthons are precursor fragments of the target compound when it is cleaved. Depending on the stability, the synthons are classified as logical and illogical synthons. Logical synthons are highly stable precursor fragments, and illogical synthons are less stable precursor fragments of the target compound.