定义明确的 Pd( I ) 金属基 [Pd( Pt Bu 3 ) 2 ] + 在室温下与芳基和烷基碘反应,生成 [Pd(P t Bu 3 ) ( μ - I ) ] 2和鏻盐。在反应过程中产生了Pd( II ) 芳基/烷基衍生物,反映了底物对金属自由基的净自由基氧化加成,并且已经分离出两个实例并对其进行了晶体学表征。
定义明确的 Pd( I ) 金属基 [Pd( Pt Bu 3 ) 2 ] + 在室温下与芳基和烷基碘反应,生成 [Pd(P t Bu 3 ) ( μ - I ) ] 2和鏻盐。在反应过程中产生了Pd( II ) 芳基/烷基衍生物,反映了底物对金属自由基的净自由基氧化加成,并且已经分离出两个实例并对其进行了晶体学表征。
hydrogenation reactions catalyzed by frustrated Lewis pairs, were synthesized in high yield under mild conditions from triaryl boranes, ammonium or phosphonium halides, and triethylsilane. The kinetics and mechanisms of the reactions of these hydridoborate salts with benzhydrylium ions, iminium ions, quinone methides, and Michael acceptors were investigated, and their nucleophilicity was determined and compared
作者:Xin Tao、Christian Wölke、Constantin G. Daniliuc、Gerald Kehr、Gerhard Erker
DOI:10.1039/c8sc04790a
日期:——
The halogenoboranes XB(C6F5)2 (X: Cl, Br) react with allene to give a mixture of the cyclotrimer 1,3,5-trimethylenecyclohexane (1) and the related halogenoborylated cyclotetramerization products 3a and 3b. Alkyl-substituted allenes were catalytically cyclotrimerized metal-free by XB(C6F5)2 (X: Cl, Br) to give cis,trans-2,4,6-trialkyl-1,3,5-trimethylenecyclohexanes under mild conditions.
卤代硼烷XB(C 6 F 5 ) 2 (X: Cl, Br)与丙二烯反应生成环三聚体1,3,5-三亚甲基环己烷( 1 )和相关卤代硼酸化环四聚产物3a和3b的混合物。XB(C 6 F 5 ) 2 (X: Cl, Br)催化烷基取代的丙二烯在温和条件下无金属环三聚得到顺式、反式-2,4,6-三烷基-1,3,5-三亚甲基环己烷.
Exploring structural and electronic effects in three isomers of tris{bis(trifluoromethyl)phenyl}borane: towards the combined electrochemical-frustrated Lewis pair activation of H<sub>2</sub>
作者:Robin J. Blagg、Elliot J. Lawrence、Katie Resner、Vasily S. Oganesyan、Thomas J. Herrington、Andrew E. Ashley、Gregory G. Wildgoose
DOI:10.1039/c5dt01918d
日期:——
Three BC6H3(CF3)2}3 isomers have been studied, ortho-substituents quench FLP H2 cleavage via steric blocking and electron donation to the boron centre.
Process for producing phosponium borate compound, novel phosphonium borate compound, and method of using the same
申请人:Masaoka Shin
公开号:US20070098616A1
公开(公告)日:2007-05-03
The invention relates to a phosphonium borate compound represented by Formula (I) (hereinafter, the compound (I)). The invention has objects of providing (A) a novel process whereby the compound is produced safely on an industrial scale, by simple reaction operations and in a high yield; (B) a novel compound that is easily handled; and (C) novel use as catalyst.
Formula (I): (R
1
)(R
2
)(R
3
)PH.BAr
4
(I)
wherein R
1
, R
2
, R
3
and Ar are as defined in the specification. The process (A) includes reacting a phosphine with a) HCl or b) H
2
SO
4
to produce a) a hydrochloride or b) a sulfate; and reacting the salt with a tetraarylborate compound. The compound (B) has for example a secondary or tertiary alkyl group as R
1
and is easily handled in air without special attention. The use (C) is characterized in that the compound (I) is used instead of an unstable phosphine compound of a transition metal complex catalyst for catalyzing C—C bond, C—N bond and C—O bond forming reactions and the compound produces an effect that is equal to that achieved by the transition metal complex catalyst.
Process for producing phosphonium borate compound, novel phosphonium borate compound, and method of using the same
申请人:Masaoka Shin
公开号:US20090305877A1
公开(公告)日:2009-12-10
The invention relates to a phosphonium borate compound represented by Formula (I) (hereinafter, the compound (I)). The invention has objects of providing (A) a novel process whereby the compound is produced safely on an industrial scale, by simple reaction operations and in a high yield; (B) a novel compound that is easily handled; and (C) novel use as catalyst.
Formula (I): (R
1
)(R
2
)(R
3
)PH.BAr
4
(I)
wherein R
1
, R
2
, R
3
and Ar are as defined in the specification.
The process (A) includes reacting a phosphine with a) HCl or b) H
2
SO
4
to produce a) a hydrochloride or b) a sulfate; and reacting the salt with a tetraarylborate compound.
The compound (B) has for example a secondary or tertiary alkyl group as R
1
and is easily handled in air without special attention.
The use (C) is characterized in that the compound (I) is used instead of an unstable phosphine compound of a transition metal complex catalyst for catalyzing C—C bond, C—N bond and C—O bond forming reactions and the compound produces an effect that is equal to that achieved by the transition metal complex catalyst.