Categories: C-P Bond Formation >
Synthesis of phosphines
Recent Literature
A versatile and efficient Pd(OAc)2/1,1'-bis(diisopropylphosphino)ferrocene-catalyzed
cross-coupling of thiols with aryl halides was developed. Aryl bromides and
chlorides can be coupled to aliphatic and aromatic thiols - the widest substrate
scope of any reported to date. This catalyst system also enables the coupling of
secondary phosphines with aryl halides.
M. Murata, S. L. Buchwald, Tetrahedron, 2004, 60,
7397-7403.
Acylphosphines are inert to air and moisture. A palladium-catalyzed C-P bond
formation reaction using acylphosphines as phosphination reagents shows
practicable reactivity with ArBr and ArOTf to afford trivalent phosphines
directly in good yields with a broad substrate scope and functional group
tolerance.
X. Chen, H. Wu, R. Yu, H. Zhu, Z. Wang, J. Org. Chem., 2021, 86,
8987-8996.
A series of novel functionalized, hemilabile phosphines have been prepared from
diarylphosphines using several synthetic methodologies - including
alkylation of lithium diarylphosphide or (diarylphosphino)borane adducts with
functionalized halogenoalkanes and the photochemical hydrophosphination of
suitable functionalized allyl or vinyl derivatives using white light.
M. V. Jiménez, J. J. Pérez-Torrente, M. I. Bartolomé, L. A. Oro, Synthesis, 2009,
1916-1922.
Phosphine oxides are selectively reduced to phoshphines in the presence of other
reducible functional groups such as ketones, esters, and olefins using
tetramethyldisiloxane (TMDS) as a mild reducing agent in the presence of copper
complexes. Based on this transformation, an efficient one pot reduction/phosphination
domino sequence generates functionalized aromatic and aliphatic phosphines in
good yields.
Y. Li, S. Das, S. Zhou, K. Junge, M. Beller, J. Am. Chem. Soc., 2012,
134, 9727-9732.
Triazole-based monophosphine ligands have been prepared via efficient
cycloadditions. Palladium complexes derived from these ligands are highly
active catalysts for Suzuki-Miyaura coupling and amination reactions of aryl
chlorides.
D. Liu, W. Gao, Q. Dai, X. Zhang, Org. Lett.,
2005, 7, 4907-4910.
A highly stereoselective asymmetric 1,4-addition of diarylphosphines to
α,β-unsaturated aldehydes catalyzed by a bis(phosphine) pincer-Pd complex
enables the synthesis of chiral phosphines with excellent stereoselectivity
under mild conditions.
Y.-R. Chen, W.-L. Duan, Org. Lett., 2011,
13, 5824-5826.
Palladium and Raney nickel catalyze the methanolysis of strongly complexed
borane-amine adducts. The method is applicable to primary, secondary, tertiary,
and aromatic amines, and the mildness of the reaction conditions allows
preservation of otherwise labile functional groups.
A [Cu(OH)•TMEDA]2Cl2 catalyzed tandem reaction allows the
synthesis of a series of sterically and electronically divergent phenacyl
tertiary phosphine-boranes.
G. Kumaraswamy, G. V. Rao, A. N. Murthy, B. Sridhar, Synlett, 2009,
1180-1184.
Related
C-P activation of phosphonium salts enables a "group-substitution" synthesis
of trivalent phosphines. An alkylation of phosphines to provide phosphonium
salts is followed by a Pd-catalyzed "de-arylation" via C-P activation and
transfer hydrogenation. With this method, a series of trivalent phosphines were
prepared from commercially available triarylphosphines.
M. Lei, X. Chen, Y. Wang, L. Zhang, H. Zhu, Z. Wang, Org. Lett.,
2022, 24, 2868-2872.
A stereoselective hydrophosphination reaction of alkynes with diphenylphosphane has been developed.
The reaction is mediated by a cobalt catalyst and butyllithium.
H. Ohmiya, H. Yorimitsu, K. Oshima, Angew. Chem. Int. Ed., 2005, 44, 2368-2370.
A catalytic amount of a Brønsted base mediates a stereoselective
diphosphination of terminal alkynes with diphosphanes to deliver the
corresponding (E)-1,2-diphosphinoethenes in good yields. This
reaction offers a good alternative to precedented transition-metal-catalyzed
or radical-promoted approaches to the 1,2-diphosphinoethene framework of
potent interest in catalysis and coordination chemistry.
Y. Okugawa, K. Hirano, M. Miura, Org. Lett., 2017, 19, 2973-2976.
Several E and Z configured α,β-unsaturated carbonyl and carboxyl
acceptors (including imides) as well as nitroalkenes participate in a
palladium(II)-catalyzed conjugate transfer of diphenyl-, dicyclohexyl-, and di-tert-butylphosphinyl
groups from silylphosphines in high chemical yields.
V. T. Trepohl, S. Mori, K. Itami, M. Oestreich, Org. Lett., 2009,
11, 1091-1094.