A flexible, highly efficient method for the preparation of homochiral oxazaphospholidine-boranes
摘要:
An efficient and operationally simple procedure for the synthesis of 2-substituted 3,4-dimethyl-5-phenyloxazaphospholidine derivatives has been developed. This new method permits the large scale preparation of a range of electronically and sterically differentiated homochiral monophosphine precursors.
Amino-derivatives of metals and metalloids. Part IV. Aminosilylation and aminophosphination of some unsaturated substrates
作者:R. H. Cragg、M. F. Lappert
DOI:10.1039/j19660000082
日期:——
The aminometallation of carbon dioxide and disulphide, and phenyl iso- and isothio-cyanate are described, using Me2Si(NEt2)2, Me2Si(NHEt)2, PhP(NMe2)2, and PhP(NMe2)Cl. The results are correlated with data on other systems. Structures are suggested for the new carbamato-, dithiocarbamato-, ureido-, and thioureido-silanes and -phosphines, on the basis of alcoholyses, infrared spectra, and analogy with
Asymmetric Hydrogenation of Ketones Using a Ruthenium(II) Catalyst Containing BINOL-Derived Monodonor Phosphorus-Donor Ligands
作者:Yingjian Xu、Nat W. Alcock、Guy J. Clarkson、Gordon Docherty、Gary Woodward、Martin Wills
DOI:10.1021/ol0481840
日期:2004.10.1
[structure: see text] A series of ruthenium(II) complexes containing BINOL-based monodonor phosphorus ligands have been prepared and applied to the asymmetric catalysis of the hydrogenation of aryl/alkyl ketones. The best ligands for this application are those which contain an aromatic groups with either a methoxide or bromide on the ortho position. Using these ligands, alcohols with ee's of up to
Iridium-Triggered Allylcarbamate Uncaging in Living Cells
作者:Neelu Singh、Ajay Gupta、Puja Prasad、Pritam Mahawar、Shalini Gupta、Pijus K. Sasmal
DOI:10.1021/acs.inorgchem.1c01790
日期:2021.9.6
solubility, stability, toxicity, cell uptake, and reactivity within complex biological milieu for bioorthogonal controlled transformation reactions is a highly formidable challenge. Herein, we report an organoiridium complex that is nontoxic and capable of the uncaging of allyloxycarbonyl-protected amines under biologically relevant conditions and within livingcells. The potential applications of this
设计一种金属催化剂来解决复杂生物环境中的溶解性、稳定性、毒性、细胞吸收和反应性等主要问题,用于生物正交控制的转化反应是一项非常艰巨的挑战。在此,我们报告了一种有机铱络合物,该络合物无毒且能够在生物相关条件下和活细胞内解开烯丙氧羰基保护的胺。通过在 HeLa 细胞内以受控方式激活原荧光团和前药后产生诊断和治疗剂,已经证明了这种解笼锁化学的潜在应用,为许多潜在的生物学和治疗应用提供了宝贵的工具。
Use of new chiral tricoordinated phosphorus borane complexes in enantioselective borane reduction of ketones: Complexes structure and mechanistic studies
New tricoordinated phosphorusborane complexes were synthesized and their use as catalysts in enantioselectiveboranereduction of prochiral aromatic and aliphatic ketones was investigated. The structure of (2R,5S)-2-o-anisyl-3-oxa-1-aza phosphabicyclo[3.3.0]octane—borane complex 1b and (2R,5S)-2,3-diphenyl-1,3-diazaphosphabicyclo[3.3.0]octane—borane complex 6a was established by X-ray diffraction
Synthesis and applications to asymmetric catalysis of a series of mono- and bis(diazaphospholidine) ligands
作者:Donald Smyth、Heather Tye、Colin Eldred、Nathaniel W. Alcock、Martin Wills
DOI:10.1039/b106399p
日期:2001.11.1
The synthesis of a series of closely related mono- and bis(diazaphospholidine) ligands has been achieved using the condensation of a diamine with a bis(dimethylamino)arylphosphine. The resulting ligands have given excellent results in palladium-catalysed allylic substitution reactions to form C–C bonds (up to 89% ee) and C–N bonds (up to 78% ee).