31673-42-4Relevant articles and documents
Synthesis of γ-Spirolactams by Birch Reduction of Arenes
Krüger, Tobias,Linker, Torsten
, p. 1585 - 1591 (2021)
A convenient method for the synthesis of γ-spirolactams in only three steps is described. Birch reduction of inexpensive and commercially available aromatic carboxylic acids in the presence of chloroacetonitrile affords nitriles in moderate to good yields. Suitable precursors are methyl-substituted benzoic acids, naphthoic, and anthroic acid. Subsequent catalytic hydrogenation proceeds smoothly with PtO2 or Raney Ni as catalysts and lactams are isolated in excellent yields and stereoselectivities. Thus, up to 3 new stereogenic centers can be constructed as sole diastereomers from achiral benzoic acids. Furthermore, it is possible to control the degree of saturation at different pressures, affording products with 0, 1, or 2 double bonds. Overall, more than 15 new γ-spirolactams have been synthesized in analytically pure form.
Enantio- and Regioselective Ir-Catalyzed Hydrogenation of Di- and Trisubstituted Cycloalkenes
Peters, Byron K.,Liu, Jianguo,Margarita, Cristiana,Rabten, Wangchuk,Kerdphon, Sutthichat,Orebom, Alexander,Morsch, Thomas,Andersson, Pher G.
supporting information, p. 11930 - 11935 (2016/10/07)
A number of cyclic olefins were prepared and evaluated for the asymmetric hydrogenation reaction using novel N,P-ligated iridium imidazole-based catalysts (Crabtree type). The diversity of these cyclic olefins spanned those having little functionality to
