Investigation of the reaction between amino acids or amino acid esters and 9-formylfluorene and its equivalents. Possible utility of the derived enamines as amino group protectants
Efficient palladium-catalyzed C(sp<sup>2</sup>)–H activation towards the synthesis of fluorenes
作者:Juan Song、Yali Li、Wei Sun、Chenglong Yi、Hao Wu、Haotian Wang、Keran Ding、Kang Xiao、Chao Liu
DOI:10.1039/c6nj02033j
日期:——
protocol for the synthesis of fluorene derivatives has been developed through palladium-catalyzed cyclization of 2′-halo-diarylmethanes via activation of arylic C–H bonds. The reactions occurred smoothly and allowed both electron-rich and electron-deficient substrates to convert into their corresponding fluorenes in good to excellent yields. Studies revealed that this Pd-catalyzedcyclization was also available
Novel Fluorinated Alkyl Fluorophosphoric Acid Salts of Onium and Ttransition Metal Complex
申请人:Kimura Hideki
公开号:US20070225458A1
公开(公告)日:2007-09-27
To obtain a polymerization initiator (acid generating agent) having excellent power for initiation of cationic polymerization without containing arsenic or antimony. [Means for solution] Provided is a specific onium salt or transition metal complex salt of a fluorinated alkyl fluorophosphoric acid.
A method for producing a biaryl compound, comprising reacting an aromatic organic compound with at least one compound selected from the group consisting of aromatic organoboron compounds and boroxine compounds, in the presence of a zero-valent nickel catalyst, phosphine ligand and base.
REACTION CATALYST FOR CROSS-COUPLING AND METHOD FOR MANUFACTURING AROMATIC COMPOUND
申请人:HOKKO CHEMICAL INDUSTRY CO., LTD.
公开号:US20150360214A1
公开(公告)日:2015-12-17
The object of the present invention is to provide a new organic phosphorus ligand that can efficiently promote cross-coupling reaction to obtain the target substance at high yield, as well as a method of manufacturing such ligand whose steric characteristics and electronic characteristics can be fine-tuned and which can be used to cause cross-coupling reaction at high yield. As a means for achieving the aforementioned object, a phosphine compound expressed by General Formula (1) below is provided.
(In the formula, R
1
and R
2
are each independently a secondary alkyl group, tertiary alkyl group, or cycloalkyl group, while R
3
and R
4
are each independently a hydrogen, aliphatic group, heteroaliphatic group, aromatic group, alicyclic group, or heterocyclic group. Note that R
3
and R
4
have no phosphorus atom and that R
3
and R
4
are not both hydrogen at the same time).