The compound may be unknown to science, so database searches might not be able to return an exact match.
You should search a better database, like SciFinder and/or Reaxys for your target compound, and/or related compounds and see how they were made.
The textbooks should point you in the right direction if you don't have database access. We require that you attempt the question (Forum Rules) - so show us your ideas for a synthesis or retrosynthesis. Look up the synthesis of cyclobutanes to get started.