A Synthesis of Two Novel Benzo[f]ninhydrin Analogs: 6-Methoxybenzo[f]ninhydrin and Thieno[f]ninhydrin

Abstract
Improved methodology for the synthesis of benzo[f]ninhydrin (1) is described. The generality of this approach is illustrated with the synthesis of two novel analogs, 6-methoxybenzo[f]ninhydrin (3) and thieno[f]ninhydrin (4).