Mass spectra of new heterocycles: XVI. Electron impact study of alkyl 5-aminothiophene-2-carboxylates was written by Klyba, L. V.;Nedolya, N. A.;Sanzheeva, E. R.;Tarasova, O. A.. And the article was included in Russian Journal of Organic Chemistry in 2017.Recommanded Product: Isopropylisothiocyanate The following contents are mentioned in the article:
Synthesis and electron impact mass spectra of alkyl 4-alkoxy-5-amino-3-methylthiophene-2-carboxylates were studied. These compounds, except for 4-(1-ethoxyethoxy) and 4-(ferrocenylmethoxy) derivatives, gave rise to a stable mol. ion whose decomposition followed three pathways. The main fragmentation pathway of the mol. ion was elimination of alkyl radical from the 4-alkoxy group, the second pathway involved expulsion of alkoxy group from the ester moiety, and the third pathway was decomposition of the thiophene ring. The mol. ions of 4-(1-ethoxyethoxy)thiophenes decomposed mainly via elimination of Et vinyl ether mol. with formation of [M-VinOEt]+· odd-electron ion, and fragmetation of the latter followed general pathways. In the mass spectra of 4-(ferrocenylmethoxy)thiophenes, the most abundant were ferrocenylmethyl ion with m/z 199 (Irel 100%) and fragmet ions derived therefrom. This study involved multiple reactions and reactants, such as Isopropylisothiocyanate (cas: 2253-73-8Recommanded Product: Isopropylisothiocyanate).
Isopropylisothiocyanate (cas: 2253-73-8) 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.Recommanded Product: Isopropylisothiocyanate
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics