Enantioselective Synthesis of α-Oxy Amides via Umpolung Amide Synthesis
作者:Matthew W. Leighty、Bo Shen、Jeffrey N. Johnston
DOI:10.1021/ja306225u
日期:2012.9.19
synthesis using a sequence beginning with a Henry addition of bromonitromethane to aldehydes and finishing with Umpolung Amide Synthesis (UmAS). Key to high enantioselection is the finding that ortho-iodo benzoic acid salts of the chiral copper(II) bis(oxazoline) catalyst deliver both diastereomers of the Henry adduct with high enantiomeric excess, homochiral at the oxygen-bearing carbon. Overall, this approach
α-氧酰胺是通过对映选择性合成制备的,使用的序列从溴硝基甲烷与醛的亨利加成开始,最后是 Umpolung 酰胺合成 (UmAS)。高对映体选择的关键是发现手性铜 (II) 双(恶唑啉) 催化剂的邻碘苯甲酸盐提供亨利加合物的两种非对映异构体,对映体过量,在含氧碳上同手性。总体而言,这种 α-氧基酰胺方法为几乎完全专注于 α-氧基羧酸的对映选择性合成的替代品提供了创新的补充。
Copper complexes and process for formatiom of copper-containing thin films by using the same
申请人:Kadota Takumi
公开号:US20050080282A1
公开(公告)日:2005-04-14
Copper-containing thin films can be industrially advantageously formed by chemical vapor deposition using as the copper source a divalent copper complex bearing β-diketonato ligands having silyl ether linkage. A representative example of the divalent copper complex is represented by the formula (I):
wherein Z is hydrogen or alkyl; X is a group represented by the formula (I-I), in which R
a
is alkylene, and each of R
b
, R
c
and R
d
is alkyl; and Y is an alkyl group or a group represented by the formula (I-I), in which R
a
is alkylene, and each of R
b
, R
c
and R
d
is alkyl.
Method for preparation of metal organic acid chelates
申请人:J H Brotech, Inc.
公开号:US06670494B1
公开(公告)日:2003-12-30
A method is disclosed where organic acid chelates can be made by reacting an organic acid ligand with a metal compound in a non aqueous environment. The chelate is thereafter recovered by means of filtration or evaporation.
Metal Complex Compound Comprising B-Diketonato Ligand
申请人:Kadota Takumi
公开号:US20080254216A1
公开(公告)日:2008-10-16
[PROBLEMS] To provide a metal complex compound capable of being suitably used for manufacturing a metal-containing thin film by the CVD method and a method for preparing a metal-containing thin film.
[MEANS FOR SOLVING PROBLEMS] A metal complex compound comprising a β-diketonato ligand having an alkoxyalkyl-methyl group, and a method for preparing a metal-containing thin film using the metal complex compound by the CVD method.
The present invention relates to 3-(4-fluorophenoxy)propionitrile having the formula (I): ##STR1## a process for preparing 3-(4-fluorophenoxy)propionitrile having the formula (I) which comprises reacting 4-fluorophenol and acrylonitrile in the presence of a tertiary amine, a process for preparing 6-fluoro-4-chromanone having the formula (II): ##STR2## which comprises reacting 3-(4-fluorophenoxy)propionitrile having the formula (I) with an acid, and a process for preparing 6-fluoro-4-chromanone having the formula (II) which comprises reacting 4-fluorophenol with acrylonitrile in the presence of a catalyst to give 3-(4-fluorophenoxy)propionitrile having the formula (I), which is then reacted with an acid. 6-Fluoro-4-chromanone is an important intermediate for the synthesis of (S)-2,3-dihydro-6-fluoro-spiro[4H-1-benzopyran-4,4'-imidazolidine]-2',5'di one (USAN: sorbinil).