We designed and synthesized novel type 1 5α-reductase inhibitors by using 3, 3- diphenylpentane skeleton as a substitute for the usual steroid skeleton. 4-(3-(4-(N- Methylacetamido) phenyl) pentan-3-yl) phenyl dibenzylcarbamate (11k) is a competitive 5α- reductase inhibitor with the IC50 value of 0.84 μM.