the synthesis of beta-carbonhomologous intermediate of norcardicin a. a general method for selective preparation of the beta-lactam ring in the presence of free phenolic hydroxyl groups

[ ' s y n t h e s i s o f b e t a ' , ' c a r b o n h o m o l o g o u s ' , ' s y n t h e s i s o f c i s ' , ' n ' , ' [ b e t a ' , ' c a r b o b e n z y l o x y ' , ' b e t a ' , ' ( p ' , ' h y d r o x y p h e n y l ) e t h y l ] ' , 3 , ' p h a t h a l i m i d o ' , 4 , ' s t y r y l ' , 2 , ' a z e t i d i n o n e ' , ' m e c h a n i s m s o f c i s a n d t r a n s ' , ' b e t a ' , ' l a c t a m r i n g f o r m a t i o n ' ]