(2,6)3P=S] reacted with acids to form a novel mercaptophosphonium salt [(2,6)3P–SH]X, solution thermolysis of which in the absence or presence of triphenylphosphine resulted in the unusual desulfurization to give the tertiary phosphonium salts [(2,6)3P–OH]X. (2,6)3P=S also reacted with alkyl iodides or bromides under mild conditions to give stable (alkylthio)phosphonium salts [(2,6)3P–SR]X (R=Me, Et
Reductive cleavage of the carbonphosphorus bond with alkali metals. III. Reactions of arylalkylphosphines
作者:Johannes A. van Doorn、Nico Meijboom
DOI:10.1002/recl.19921110402
日期:——
The reductive cleavage of phenylalkylphosphines Ph2PR, PhPR2 (R = Bu, iPr) with Na/NH3 is unselective: both phenyl and alkyl groups can be cleaved and Birch reduction may occur. Reaction of Ph2tBuP gives a high yield of diphenylphosphide. Polar groups (CO2Na, SO3,Na) at the ω position of primary alkyl groups may lead to an increase in selectivity; Birch reduction is suppressed and a functionalised
METHOD FOR PRODUCING CATALYST FOR CYCLIC CARBONATE SYNTHESIS
申请人:MARUZEN PETROCHEMICAL CO., LTD.
公开号:US20160108071A1
公开(公告)日:2016-04-21
The present invention provides a method for easily and inexpensively producing a heterogeneous catalyst used to synthesize a cyclic carbonate by reacting an epoxide with carbon dioxide and having excellent catalyst activity; a catalyst obtained using said manufacturing method; and a method for synthesizing a cyclic carbonate using said catalyst.
A method for producing a catalyst that is used for the purpose of synthesizing a cyclic carbonate by subjecting to a reaction an epoxide with carbon dioxide, said method comprising the following steps (a) and (b):
(a) a step of obtaining a catalyst precursor having a haloalkyl group or a haloaryl group by reacting a silane compound with a silica gel in the presence of xylene, the silane compound having a haloalkyl group or a haloaryl group and
(b) a step of obtaining a catalyst for synthesizing a cyclic carbonate by reacting the catalyst precursor obtained in step (a) with a tertiary phosphine.
Reactions of palladium complex of N,N-dimethylbenzylamine with aromatic phosphines bearing the methoxy groups at the 2,6-positions
作者:Jian-Fang Ma、Yasushi Kojima、Yasuhiro Yamamoto
DOI:10.1016/s0022-328x(00)00586-6
日期:2000.12
bearing a H2O ligand was obtained. The reaction with HCl (aq) led to a cleavage of a Pd–C bond to give [PdCl3(PPh3)][PhCH2NHMe2] (6). X-ray analyses of 4 and 6 were also carried out. Reactions of 1 or 2a with mesityl isocyanide (MesNC) proceeded with replacement of a Cl atom with isocyanide and insertion of isocyanide to produce [(C6H4CH2NMe2-C2,N)PdCl(MesNC)] (7) and [C6H4CH2NMe2-C2)PdCl(MesNC)2] (8).
[[C 6 H 4 CH 2 NMe 2 - C 2,N)PdCl] 2(1)与(2,6-二甲氧基苯基)二苯基膦(MDMPP),双(2,6-二甲氧基苯基)苯基膦(BDMPP)的反应,和三(2,6-二甲氧基苯基)膦(TDMPP)得到相应的配合物[(C 6 H 4 CH 2 NMe 2 - C 2,N)PdCl(L)](2a:L = MDMPP; 2b:L = BDMMP ;2c:L = TDMPP)。2与NaPF 6的反应导致替换成氯原子的甲氧基的O原子以形成相应的配合物[(C 6 H ^ 4 CH 2 NME 2 - c ^ 2,Ñ)的Pd(L)](PF 6)(3)。用HCl(水溶液)处理3,在3中的N原子处发生质子化反应,得到[(C 6 H 4 CH 2 NHMe 2 - C 2)PdCl(L)](5)。根据X射线对2c,3a,3b,5a和在图5c中,带有BDMPP和TDMPP配体的配合
1:1 Complexes of dimethyltin dihalides with tris(2,6-dimethoxyphenyl)phosphine oxide, its sulphide, and related compounds
Dimethyltin dihalides Me2SnX2 (X = Cl, Br) only form 1:1 complexes with 2,6-dimethoxyphenylphosphine oxides Φ3PO, PhΦ2PO and Ph2ΦPO (Φ = 2,6-(MeO)2C6H3) even though the ligands are used in excess. 2,6-Dimethoxyphenylphosphine sulphides Φ3PS and PhΦ2PS also form analogous 1:1 complexes, while Ph2ΦPS and Ph3PS do not react. X-Ray crystal structural analysis of Me2SnCl2·OPΦ3 reveals that the tin