Penicillanic acid derivatives, processes for their preparation and pharmaceutical compositions containing them
申请人:PFIZER INC.
公开号:EP0002927B1
公开(公告)日:1981-02-25
US4260598A
申请人:——
公开号:US4260598A
公开(公告)日:1981-04-07
US4461726A
申请人:——
公开号:US4461726A
公开(公告)日:1984-07-24
Desulfurization of penicillins to prepare azetidinones
申请人:Hoffmann-La Roche Inc.
公开号:US04461726A1
公开(公告)日:1984-07-24
A process for the Raney nickel desulfurization of penicillins is described. In the process of the invention, amino penicillanic acid or derivatives thereof are reacted with Raney nickel under controlled conditions of temperature and time to yield azetidinones which are useful as intermediates for the synthesis of monocyclic beta-lactam antibiotics.