Ruthenium-catalysed cycloisomerisation of hepta-1,6-diynes in the presence of functionalised terminal olefins yields five-membered cyclic products with variable unsaturated side chains and is applicable to the synthesis of highly functionalised hetero- and carbocycles.
Synthesis of Pyrrole-3,4-diacetic Acid and Its Derivatives
作者:Gian Paolo Chiusoli、Mirco Costa、Sara Reverberi
DOI:10.1055/s-1989-27217
日期:——
A simple procedure for the synthesis of pyrrole-3,4-diacetic esters and N-derivatives thereof consists of the oxidative alkoxycarbonylation of dipropargylamine or N-derivatives to give 3,4-bis(alkoxycarbonylmethylene) pyrrolidines which can be easily isomerized to pyrrole-3,4-diacetic esters. Controlled hydrolysis of these esters affords pyrrolidine-3,4-diacetic acid.
Novel photoresist monomers, polymers thereof, and photoresist compositions containing the same
申请人:——
公开号:US20020012879A1
公开(公告)日:2002-01-31
Dipropargyl acetamide derivatives of following Formula 1 which are photoresist monomers, polymers thereof, and photoresist compositions containing the same. The photoresist polymer has high etching resistance, adhesiveness and post-exposure delay stability. As a result, the photoresist composition is suitable to form a fine pattern in a deep ultraviolet region.
1
wherein, n is an integer from 0 to 5.