Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate, is researched, Molecular C9H13NO2, CAS is 2199-44-2, about Synthesis and some reactions of pyrroles with aliphatic acyl substituents.Formula: C9H13NO2.
4-Acylpyrrolecarboxylates (I; R = EtCO, C15H31CO, C17H35CO) were prepared in about quant. yields of Friedel-Crafts acylation of I (R = H). Reduction of I by NaBH4 gave 82-97% of alc. (II; R = Et, C15H31, R1 = H). Heating II (R = C15H31, R1 = H) in pyridine with Ac2O gave 96% acryl derivative II (R = C15H31, R1 = Ac). Treatment of I (R = C17H35CO) with Pb(OAc)4 gave an acylated intermediate which with 40% HBr and MeOH gave 85% pyrrole (III; R = C17H35CO, R1 = MeO). Similarly III (R = C15H31CO, R1 = Cl) was obtained in 75% yield.
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Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com