Disclosed is a process for the conversion of acyclic C5 feedstock to a product comprising cyclic C5 compounds, such as, for example, cyclopentadiene, and catalyst compositions for use in such process.The process comprises the steps of contacting said feedstock and, optionally, hydrogen under acyclic C5 conversion conditions in the presence of a catalyst composition to form said product. The catalyst composition comprising a microporous crystalline aluminosilicate having a constraint index in the range of 3 to 12, a Group 10 metal, and, optionally, a Group 11 metal, in combination with a Group1 alkali metal and/or a Group 2 alkaline earth metal.