In 2022,Tu, Hang-Fei; Jeandin, Alienor; Suero, Marcos G. published an article in Journal of the American Chemical Society. The title of the article was 《Catalytic Synthesis of Cyclopropenium Cations with Rh-Carbynoids》.Computed Properties of C5H11NO2 The author mentioned the following in the article:
Herein, the authors report the first catalytic one-step synthesis of cyclopropenium cations (CPCs) with readily available alkynes and hypervalent iodine reagents as carbyne sources. Key to the process is the catalytic generation of a novel Rh-carbynoid that formally transfers monovalent cationic carbynes (:+C-R) to alkynes via an oxidative [2+1] cycloaddition The authors′ process is able to synthesize a new type of CPC substituted with an ester group that underpins the regioselective attack of a broad range of carbon and heteroat. nucleophiles, thus providing a new platform for the synthesis of valuable cyclopropenes difficult or not possible to make by current methodologies. The experimental process involved the reaction of tert-Butyl carbamate(cas: 4248-19-5Computed Properties of C5H11NO2)
tert-Butyl carbamate(cas: 4248-19-5) belongs to anime. Halogenation, in which one or more hydrogen atoms of an amine is replaced by a halogen atom, occurs with chlorine, bromine, and iodine, as well as with some other reagents, notably hypochlorous acid (HClO). With primary amines the reaction proceeds in two stages, producing N-chloro- and N,N-dichloro-amines, RNHCl and RNCl2, respectively. With tertiary amines, an alkyl group may be displaced by a halogen.Computed Properties of C5H11NO2
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics