Asymmetric Palladium-Catalyzed C–H Functionalization Cascade for Synthesis of Chiral 3,4-Dihydroisoquinolones
作者:Manman Sun、Haijian Wu、Xiangyu Xia、Weida Chen、Zhiming Wang、Jianguo Yang
DOI:10.1021/acs.joc.9b01372
日期:2019.10.18
A palladium-catalyzed C-H functionalization/intramolecular asymmetric allylation cascade of N-sulfonyl benzamides with 1,3-dienes has been developed. In the presence of a chiral pyridine-oxazoline ligand, this protocol enables the synthesis of chiral 3,4-dihydroisoquinolones in yields of up to 83% with enantioselectivities of up to 96%, using environmentally friendly air as the terminal oxidant.
POSITIVE RESIST COMPOSITION AND PATTERN FORMING METHOD USING THE SAME
申请人:HIRANO Shuji
公开号:US20080248419A1
公开(公告)日:2008-10-09
A positive resist composition, includes: (A) a resin that has a group having absorption at 248 nm at a main chain terminal of the resin (A), and a pattern forming method uses the composition.
Bio-electrode composition, bio-electrode, and method for manufacturing the bio-electrode
申请人:SHIN-ETSU CHEMICAL CO., LTD.
公开号:US10792489B2
公开(公告)日:2020-10-06
The present invention provides a bio-electrode composition capable of forming a living body contact layer for a bio-electrode that is excellent in conductivity and biocompatibility, is light-weight, can be manufactured at low cost, and can control significant reduction in conductivity even though the bio-electrode is soaked in water or dried. The present invention is accomplished by a bio-electrode composition including an ionic material and a resin, in which the ionic material is a lithium salt, a sodium salt, a potassium salt, a calcium salt, or an ammonium salt of sulphonamide represented by the following general formula (1).
[R1—C(═O)—N−—SO2—Rf1]nMn+ (1)
introduces new disconnections to the chemistry lexicon, enabling the interconversion of ring systems via selective breaking/re-making of the carbon framework. We describe the one-pot transformation of pyridines into benzene derivatives, using a nucleophilic addition ring-opening/ring-closing (ANRORC) process with soft nucleophiles such as malonate. Triflic anhydride activates the pyridine to ANRORC synthesis