Butane 2,2,4-trimethoxy

Recent Trends in Functionalization of Telechelics. As described before, the direct carboxylation of polymeric organolithium with carbon dioxide in hydrocarbon solution often results in inefficient functionalization (170). Alternatively, an ortho-ester functionalized alkyl chloride, namely 4-chloro-l,l,l-trimethoxy butane, was used to prepare ortho-ester functionalized polymers (194). 

---