Expansion of Thiele’s Acid Chemistry in Pursuit of a Suite of Conformationally Constrained Scaffolds
2015
The Diels–Alder dimer of cyclopentadiene carboxylate, Thiele’s acid has conformational properties that make it attractive as a molecular scaffold for applications in supramolecular and biological chemistry. However, a lack of known reaction methodology for derivatives of Thiele’s acid (or the corresponding esters) has hampered its utilization in these fields. We describe an improved preparation of Thiele’s esters and survey the chemistry of these versatile intermediates. As part of this effort, we also describe the synthesis of a suite of Thiele’s acid (or ester) analogues spanning a broad range of cleft angles.
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