Radical Carbofluorination of Unactivated Alkenes with Fluoride Ions
作者:Zhonglin Liu、He Chen、Ying Lv、Xinqiang Tan、Haigen Shen、Hai-Zhu Yu、Chaozhong Li
DOI:10.1021/jacs.8b03077
日期:2018.5.16
The copper-assisted radical carbofluorination of unactivatedalkenes with fluoride ions is described. With [Cu(L3)F2]H2O (L3 = 4,4'-di(methoxycarbonyl)-2,2'-bipyridine) as the fluorine source and [Ag(DMPhen)(MeCN)]BF4 (DMPhen = 2,9-dimethyl-1,10-phenanthroline) as the chloride scavenger, the reaction of unactivatedalkenes with CCl4 in acetonitrile provided the corresponding carbofluorination products
The present invention provides a process for preparing 3-(methylthio)propanal which can sufficiently decrease the production of high-boiling impurities as a by-product. The process comprises reacting acrolein and methyl mercaptan in the presence of Allylamines (I), Triallylamines (II), and preferably an optional organic acid. The preferred amount of Allylamines (I) is 0.001 to 0.50 mol per 1 mol of Triallylamines (II).
作者:Folke Skoog、Hamzi Q. Hamzi、Alicja M. Szweykowska、Nelson J. Leonard、Kermit L. Carraway、Tozo Fujii、John P. Helgeson、Richard N. Loeppky
DOI:10.1016/s0031-9422(00)86080-x
日期:1967.9
increased cytokininactivity. Adenine derivatives with cyclic substituents in the N 6 -position (benzyl-Ic), cyclohexyl-, etc.) showed the same general range of activity, potentiation by unsaturation, and variation in activity with substituent size, etc. as did the alkyl derivatives. Heteroatoms in or on the substituent groups decreased activity (in the case of N or Cl) or had little effect (S for O
METHOD OF PRODUCING A POLYMERIC MATERIAL, POLYMER, MONOMERIC COMPOUND AND METHOD OF PREPARING A MONOMERIC COMPOUND
申请人:Rolfe James
公开号:US20090156706A1
公开(公告)日:2009-06-18
A method of producing a polymeric material, said method including the step of subjecting a starting material which includes a group of sub-formula (XIII)
where R
16
is selected from hydrogen, halo, nitro, hydrocarbyl, optionally substituted or interposed with functional groups, or
R
2
and R
3
are independently selected from (CR
6
R
7
)
n
or a group CR
8
R
9
, CR
6
R
7
CR
8
R
9
or CR
8
R
9
CR
6
R
7
where n is 0, 1 or 2, R
6
and R
7
are independently selected from hydrogen or alkyl, and either one of R
8
or R
9
is hydrogen and the other is an electron withdrawing group, or R
8
or R
9
together form an electron withdrawing group; and
R
4
and R
5
are independently selected from CH or CR
1o
where CR
1o
is an electron withdrawing group,
the dotted lines indicate the presence or absence of a bond, X
1
is a group CX
2
X
3
where the dotted line bond to which it is attached is absent and a group CX
2
where the dotted line bond to which it is attached is present, Y
1
is a group CY
2
Y
3
where the dotted line bond to which it is attached is absent and a group CY
2
where the dotted line bond to which it is attached is present, and X
2
and X
3
, and, if present, Y
2
and Y
3
, are each a C
1
to C
4
alkyl group;
to conditions under which polymerisation of the starting material occurs.
GOLD CATALYZED HYDROAMINATION OF ALKYNES AND ALLENES
申请人:Bertrand Guy
公开号:US20110166349A1
公开(公告)日:2011-07-07
Methods are provided for the catalytic hydroamination of compounds having an alkyne or allene functional group, in which the compound is contacted with ammonia or an amine in the presence of a catalytic amount of a gold complex under conditions sufficient for hydroamination to occur.