1-aminocyclobutanecarboxylates with methanesulfonyl chloride followed by alkylation with methyl iodide and subsequent cyclization in the presence of potassium tert-butoxide in N,N-dimethylformamide is reported. An efficient synthesis of starting 1-aminocyclopropane- and 1-aminocyclobutanecarboxylic acids was developed. The reaction of spiro[cycloalkane-1,3′-1′λ6-isothiazolidine]-1′,1′,4′-triones with N,N-dimethylformamide
Expected and unforeseen reactions of 2,3,3-trimethyl-1λ6-isothiazolidine-1,1,4-trione and their spiro derivative
作者:Maria V. Popova、Alexey V. Dobrydnev、Viktoriya V. Dyakonenko、Irina S. Konovalova、Svitlana V. Shishkina、Yulian M. Volovenko
DOI:10.1016/j.tet.2019.01.031
日期:2019.3
present a full account of our studies with respect to the reactivity of insufficiently explored 1λ6-isothiazolidine-1,1,4-triones (so-called β-keto-γ-sultams). This heterocyclic system possesses two reaction centers: the EWG-activated methylene group and the carbonyl moiety which were investigated in the course of present study. 2,3,3-Trimethyl-1λ6-isothiazolidine-1,1,4-trione and 4-methyl-5λ6-thia-4-azaspiro[2