Access to a chiral phosphine-NHC palladium(II) complex via the asymmetric hydrophosphination of achiral vinyl azoles by Seah, Jeffrey Wee Kiong, Li, Yongxin, Pullarkat, Sumod A., Leung, Pak-Hing

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Synthesis, structural characterisation and stereochemical investigation of chiral sulfur-functionalised N-heterocyclic carbene complexes of palladium and platinum by Krishnan, Deepa, Wu, Meiyi, Li, Yongxin, Leung, Pak-Hing, Pullarkat, Sumod A.

“…Palladium and platinum complexes containing a sulfur-functionalised N-heterocyclic carbene (S-NHC) chelate ligand have been synthesised. …”
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Catalytic approach toward chiral P,N-chelate complexes utilizing the asymmetric hydrophosphination protocol by Katona, Dávid, Lu, Yunpeng, Li, Yongxin, Pullarkat, Sumod A., Leung, Pak-Hing

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Palladium catalyzed asymmetric hydrophosphination of α,β- and α,β,γ,δ-unsaturated malonate esters : efficient control of reactivity, stereo- and regio-selectivity by Leung, Pak-Hing, Yang, Xiang-Yuan, Gan, Jun Hao, Li, Yongxin, Pullarkat, Sumod A.

“…Both PC-cyclometalated and PCP-pincer type palladium catalysts have recently been found to be robust and efficacious catalysts for the asymmetric P–H addition reaction involving activated olefins. …”
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Evaluation of palladacycles as a non-rhodium based alternative for the asymmetric conjugate 1,4-addition of arylboronic acids to α,β-unsaturated enones by Wong, Jonathan, Gan, Kennard, Chen, Houguang Jeremy, Pullarkat, Sumod A.

“…While the rhodium(I)-catalysed reaction has been thoroughly explored, the asymmetric palladium-catalysed protocol is far less developed and understood, particularly with acyclic enones as substrates. …”
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Asymmetric catalytic 1,2-dihydrophosphination of secondary 1,2-diphosphines - direct access to free P*- and P*,C*-diphosphines by Teo, Ronald Hong Xiang, Chen, Jeremy Houguang, Li, Yongxin, Pullarkat, Sumod A., Leung, Pak-Hing

“…The synthesized ligands can also undergo direct complexation onto palladium affording complexes with complete retention of stereo-integrity. …”
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Intermolecular insertion of dialkynylphosphanes into the M–C bond of cyclopalladated rings through activation by cyclometallated amines by Chen, Shuli, Pullarkat, Sumod A., Li, Yongxin, Leung, Pak-Hing

“…The P Pd bond must be kinetically labile since the palladium complexes readily undergo a facile ligand redistribution process. …”
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Access to C-Stereogenic PN(sp²)P Pincer Ligands via Phosphapalladacycle Catalyzed Asymmetric Hydrophosphination by Foo, Ce Qing, Sadeer, Abdul, Li, Yongxin, Pullarkat, Sumod A., Leung, Pak-Hing

“…A series of PN(sp2)P ligands containing two stereogenic carbon centers were generated via the palladium(II) catalyzed asymmetric hydrophosphination of 2,6-pyridyl dienones using diphenylphosphine. …”
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Asymmetric hydroarsination reactions toward synthesis of alcohol functionalised C-chiral As–P ligands promoted by chiral cyclometallated complexes by Cheow, Yuen Lin, Li, Yongxin, Leung, Pak-Hing, Pullarkat, Sumod A.

“…Hydroarsination of 3-diphenylphosphanyl-but-3-en-1-ol with diphenylarsine generated only one stereoisomer as five-membered As–P bidentate chelate on chiral naphthylamine palladium template. Using the same chiral metal template, similar hydroarsination reaction was carried out on 2-diphenylphosphanyl-prop-2-en-1-ol which gave two different products in the ratio of 2.6 to 1. …”
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Stability and Reactivity of Cyclometallated Naphthylamine Complexes in Pd–C Bond Insertion Reactions with Coordinated Alkynylphosphanes by Chen, Shuli, Chiew, Jun Xuan, Pullarkat, Sumod A., Li, Yongxin, Leung, Pak-Hing

“…No intramolecular insertion reaction occurred. In contrast to its palladium analogue, the ortho-platinated ring is not reactive towards coordinated PhP(C≡CPh)2, although it can promote the Pd–C bond insertion reaction. …”
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Mechanistic insights into the PdII-catalyzed chemoselective N-demethylation vs. cyclometalation reactivity pathways in 1-Aryl-N,N-dimethylethanamines by Yap, Jeanette See Leng, Ding, Yi, Yang, Xiang-Yuan, Wong, Jonathan, Li, Yongxin, Pullarkat, Sumod A., Leung, Pak-Hing

“…The N-demethylation process could be catalyzed at room temperature by palladium(II) catalysts such as PdCl2 or Pd(OAc)2. …”
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Synthesis, optical resolution, and stereochemical properties of a rationally designed chiral C–N palladacycle by Li, Yongxin, Pullarkat, Sumod A., Leung, Pak-Hing, Yap, Jeanette See Leng, Chen, Houguang Jeremy

“…The metal complexation process could thus generate a cyclopalladated complex in high yield, lead to an unexpected N-demethylated amine palladium(II) complex, or both. Both products have been isolated and characterized crystallographically in the solid state and spectroscopically in solution. …”
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