Imines 2-azetidiniminium salts from

AZETIDINIMINIUM SALTS FROM KETENIMINIUM SALTS AND IMINES... [Pg.85]

Azetidiniminium salts - ° are available from the reaction of imines with iminium salts derived from tertiary carboxamides. These smoothly react with phosgene "- to yield a-chloroiminium... [Pg.108]

While cycloadditions of imines with ketenes or their precursors often produce cis P-lactams, the corresponding reactions of keteniminium salts are trans stereoselective (equations 70 and 71). 0 222 It is not clear whether the trans stereoselectivity is kinetic or results from an equilibration of 2-azetidiniminium salts under the basic conditions used in both cycloaddition and hydrolysis steps. [Pg.111]

See also in sourсe #XX -- [ Pg.108 , Pg.109 , Pg.110 , Pg.111 , Pg.112 ]

See also in sourсe #XX -- [ Pg.5 , Pg.108 , Pg.109 , Pg.110 , Pg.111 , Pg.112 ]

See also in sourсe #XX -- [ Pg.108 , Pg.109 , Pg.110 , Pg.111 , Pg.112 ]

See also in sourсe #XX -- [ Pg.5 , Pg.108 , Pg.109 , Pg.110 , Pg.111 , Pg.112 ]

Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...