Oehme, H. et al. published their research in Zeitschrift fuer Anorganische und Allgemeine Chemie in 1980 | CAS: 10203-58-4

Diethyl isobutylmalonate (cas: 10203-58-4) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Computed Properties of C11H20O4

Synthesis and structure of 3,7-dioxa-1-phosphabicyclo[3.3.1]nonanes was written by Oehme, H.;Leissring, E.;Meyer, H.. And the article was included in Zeitschrift fuer Anorganische und Allgemeine Chemie in 1980.Computed Properties of C11H20O4 This article mentions the following:

2,2-Bis(hydroxymethyl)-1-isopropylethylphosphine and 2,2-bis(hydroxymethyl)-1,1-dimethylethylphosphine, prepared by LiAlH4 reduction of the appropriate 1-phosphonoalkylmalonate, react with BzH and anisaldehyde according to an acid catalyzed O,P-cycloacetalization to give dioxaphosphabicyclononane I (R1 = H, R2 = Me2CH, R = Ph; R1 = R2 = Me, R = Ph, p-anisyl). Aliphatic aldehydes under the same conditions do not form the bicyclic system but give dioxanes II (R = Me, Et, Et3C). The mechanism of the cyclocondensation reaction is discussed based on an alkoxycarbenium ion transition state. Although the relative configuration of the C-2,8-atoms could not really be proved, in particular the PH coupling constants indicate the C-2,8-protons to occupy the exo-positions. In the experiment, the researchers used many compounds, for example, Diethyl isobutylmalonate (cas: 10203-58-4Computed Properties of C11H20O4).

Diethyl isobutylmalonate (cas: 10203-58-4) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Computed Properties of C11H20O4

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