Hydrophosphonylation of Alkynes with Trialkyl Phosphites Catalyzed by Nickel
作者:Rosa E. Islas、Juventino J. García
DOI:10.1002/cctc.201700974
日期:2017.11.9
The use of simple and inexpensive NiCl2⋅6 H2O as a catalyst precursor for C−P bond formation in the presence of commercially available trialkyl phosphites (P(OR)3, R=Et, iPr, Bu, SiMe3) along with several alkynes is presented. Control experiments showed the in situ formation of (RO)2P(O)H as the species that undergo the addition into the C≡C bond at the alkynes to yield the product of P−H addition
利用简单且廉价的NiCl的2 ⋅6ħ 2在市售的三烷基亚磷酸酯的存在O作为催化剂前体对C-P键的形成(P(OR)3,R =的Et,我镨,卜,森达3)以及几种炔烃。对照实验表明,原位形成(RO)2 P(O)H,是在炔烃中经过CROC键加成后生成PH加成物的物种。二苯乙炔与P(OEt)3,P(O i Pr)3和P(OSiMe 3)3的氢膦酰基化无需特定的溶剂或配体,即可以高收率(> 92%)进行合成。该方法可用于制备作为末端炔烃模型的苯乙炔和内部炔烃的有机膦酸酯,其收率范围从良好到中等。
The comparison of addition of molecules possessing P(V)-H bond to alkynes catalyzed with Pd and Ni complexes
作者:V. P. Ananikov、L. L. Khemchyan、I. P. Beletskaya
DOI:10.1134/s1070428010090010
日期:2010.9
Main factors have been analyzed necessary for creation of an efficient catalytic system for alkynes hydrophosphorylation based on nickel complexes, and a valid model system was suggested for the comparison with palladium complexes. It has been discovered for the first time that the insertion of an alkyne into the metal-hydrogen bond occurs with a considerably lower activation barrier than into the metal-phosphorus bond, whereas the variation in the reaction energy corresponds in both cases to an exothermic reaction. Under the optimized conditions the transformation catalyzed by nickel complexes does not require acid addition and may proceed even in the absence of a phosphine ligand.