Show how each of the following transformations might be best accomplished. More than one step may be required. Show all reagents and all intermediate structures.
-Refer to instructions. 
Definitions:
Central Nervous System
The complex of nerve tissues that controls the activities of the body. In vertebrates, it comprises the brain and spinal cord.
Neurons
The basic working units of the brain, specialized cells responsible for receiving, transmitting, and processing neural information.
Stem Cells
Undifferentiated biological cells that can differentiate into specialized cells and can divide to produce more stem cells, offering potential in regenerative medicine.
Immature Cells
Cells that have not yet developed into their final form or function, often found in the early stages of growth and development.
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