Construct object wit array

I have a array of objects:

const arr = [
  {
    name: "Name 1",
    symbol: "S1"
  },
  {
    name: "Name 2",
    symbol: "S2"
  },
]

And I want to transform this on this

{
  S1: "Name 1", S2: "Name 2"
}

I tried this

arr.map((a) => { [a.symbol]: a.name })

But no luck. How can I achieve this?