I have a single table like 

    create table Mytable (ID int identity, Name nvarchar(10))

Now I want to update my Name column like this

    Update MyTable
    set name = case ID when 1 then DEFAULT END

But I am getting error 

>Incorrect syntax near the keyword 'DEFAULT'

How can I use UPDATE with DEFAULT statement in CASE clause?

I am using SQL Server 2014.