Phipps, Erik J. T. et al. published their research in Synlett in 2019 | CAS: 33439-27-9

1-Tosylpiperidin-4-one (cas: 33439-27-9) belongs to piperidine derivatives. The piperidine structural motif is present in numerous natural alkaloids. These include piperine, which gives black pepper its spicy taste. Industrially, piperidine is produced by the hydrogenation of pyridine, usually over a molybdenum disulfide catalyst. Pyridine can also be reduced to piperidine via a modified Birch reduction using sodium in ethanol.Quality Control of 1-Tosylpiperidin-4-one

Rhodium(III)-Catalyzed Cyclopropanation of Unactivated Olefins Initiated by C-H Activation was written by Phipps, Erik J. T.;Piou, Tiffany;Rovis, Tomislav. And the article was included in Synlett in 2019.Quality Control of 1-Tosylpiperidin-4-one This article mentions the following:

A rhodium(III)-catalyzed cyclopropanation of unactivated olefins and N-enoxyphthalimides initiated by an alkenyl C-H activation was developed to afford the corresponding products I [R = Ph, CH2Bn, 2-naphthyl, etc.; R1 = Et; R1R1 = CH2C(CN)2CH2, (CH2)4, (CH2)5, etc.] in good yields. A variety of 1,1-disubstituted olefins undergo efficient cyclopropanation with a slight excess of alkene stoichiometry. A series of mechanistic interrogations implicated a metal carbene as an intermediate. In the experiment, the researchers used many compounds, for example, 1-Tosylpiperidin-4-one (cas: 33439-27-9Quality Control of 1-Tosylpiperidin-4-one).

1-Tosylpiperidin-4-one (cas: 33439-27-9) belongs to piperidine derivatives. The piperidine structural motif is present in numerous natural alkaloids. These include piperine, which gives black pepper its spicy taste. Industrially, piperidine is produced by the hydrogenation of pyridine, usually over a molybdenum disulfide catalyst. Pyridine can also be reduced to piperidine via a modified Birch reduction using sodium in ethanol.Quality Control of 1-Tosylpiperidin-4-one

Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem