What would the name of this organic compound be? I am a little lost in naming this compound. 

I think it would be something like 2 bromo 4 methylene pentene?? 

Is that close? 

It is a five carbon chain, so pentane, with a Br on carbon two, a methylene substituent on carbon 4, and a alkene on carbon 1.
2-Bromo-4-methylpenta-1,4-diene