benzyl 11-bromoundecanoate 、
caesium 5-(Cbz-amino)-4-oxopentanoate 在
crude product 、 silica gel 、
ethyl acetate n-hexane 、 product ( 3 ) 作用下,
以0.69 g (47%) product was obtained (pinkish solid, mp 70-72° C.)的产率得到10-(benzyloxycarbonyl)decyl 5-(Cbz-amino)-4-oxopentanoate