SALT AND PHOTORESIST COMPOSITION CONTAINING THE SAME
申请人:ICHIKAWA Koji
公开号:US20100316951A1
公开(公告)日:2010-12-16
A salt having a group represented by the formula (I):
-T (I)
wherein T represents a C3-C36 alicyclic hydrocarbon group in which at least two methylene groups are replaced by —O— or —S— and which can have one or more substituents.
Herein, we describe an intermolecular direct branched‐selective α‐alkylation of cyclicketones with simple alkenes as the alkylation agents. Through an enamine‐transition metal cooperative catalysis mode, the α‐alkylation is realized in an atom‐ and step‐economic manner with excellent branched selectivity for preparing β‐branched ketones. Employment of a pair of bulky Brønsted acid and base as additives