(a) A synthesis of pyrimidine is outlined below

(i) Give a mechanism for Step 1. (5 marks) 

(ii) Give a mechanism for Step 2. (2 marks)

(b) Give the structure of the product formed in the following reaction. (2 marks)

(c) Uracil can be converted into cytosine by the following reaction sequence:

i) Provide a reaction mechanism for Step 3. (2 marks)

Transcribed Image Text:

cat. HCI N. H H. H2N NH2 in EtOH, heat Step 1 POCI3 heat Step 2 N. H2/Pd-C N. in EtOH N' CI Step 3 ZI cat. HCI N. H H. H2N NH2 in EtOH, heat Step 1 POCI3 heat Step 2 N. H2/Pd-C N. in EtOH N' CI Step 3 ZI