Methyl 3,3,7,7,9-pentamethyl-1,5-dioxaspiro[5.5]undec-8-ene-8-carboxylate

Abstract

The crystal structure of the title ester, C16H26O4, consists of discrete spiro­cyclic mol­ecules. The six‐membered 1,3‐dioxane fragment is in a chair conformation and the cyclo­hexene fragment is in a distorted half‐chair conformation. In the crystal structure, the mol­ecules are connected by weak C—H⋯O contacts, with C⋯O distances ranging from 2.642 (1) to 2.762 (1) Å, forming a three‐dimensional network.