Culmann, Jean-Christophe’s team published research in Tetrahedron Letters in 1989 | CAS: 6553-72-6

Ethyl 1-methylcyclopentanecarboxylate(cas: 6553-72-6) is a member of cyclopentanes. Although cyclopentane itself doesn’t have a single highly favoured conformation, a substituent on the cyclopentane ring can upset the balance of strains thereby favouring either the envelope or the half-chair.Synthetic Route of C9H16O2

In 1989,Tetrahedron Letters included an article by Culmann, Jean-Christophe; Cherry, Ghassan; Jost, Roland; Sommer, Jean. Synthetic Route of C9H16O2. The article was titled 《Temperature controlled selectivity in methylcyclopentane carbonylation in HF-SbF5》. The information in the text is summarized as follows:

Protolytic ionization of methylcyclopentane in HF-SbF5, followed by carbonylation at atm. pressure yields either methylcyclopentanecarboxylate I or cyclohexanecarboxylate II depending on the reaction temperature The experimental part of the paper was very detailed, including the reaction process of Ethyl 1-methylcyclopentanecarboxylate(cas: 6553-72-6Synthetic Route of C9H16O2)

Ethyl 1-methylcyclopentanecarboxylate(cas: 6553-72-6) is a member of cyclopentanes. Although cyclopentane itself doesn’t have a single highly favoured conformation, a substituent on the cyclopentane ring can upset the balance of strains thereby favouring either the envelope or the half-chair.Synthetic Route of C9H16O2

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics