Are there alternatives to 2,3,4,7-Tetrahydro-1H-indene (CAS: 7603-37-4) in synthesis?

2,3,4,7-Tetrahydro-1H-indene (CAS 7603-37-4) is often used as a starting material in organic synthesis. Alternatives include other indenes with similar structures, such as 1-indene or 9-indene. Other synthetic routes may involve using simpler precursors like benzene derivatives, and substituting functional groups to achieve the desired product. It is important to consider the reactivity and availability of these alternatives.