Dibromophosphines, RPBr2, are obtained by reaction of tetrabromomethane with 7-substituted 7-phosphanorbornenes in toluene at ca. 100 degrees C. The phosphanorbornenes are obtained in situ by cycloaddition of N-phenylmaleimide with 1-substituted 3,4-di-methylphospholes. The overall reaction sequence shows a good compatibility with functional groups.
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。
Exploring the coordination chemistry and reactivity of dialkylamino- and bis(dialkylamino)-phosphines in the coordination sphere of metals
作者:Philip W. Dyer、John Fawcett、Martin J. Hanton、Raymond D. W. Kemmitt、Ranbir Padda、Narendra Singh
DOI:10.1039/b208886j
日期:2003.12.20
[RhCl(CO)2}2] and elemental selenium have been undertaken and the products used to assess the phosphines' donor capabilities. Depending on the substituents at phosphorus, either trans-diphosphine or cis-dicarbonyl complexes result from reaction with [RhCl(CO)2}2]. The sterically demanding phosphine P(NPri2)2Ph (5) proved unreactive towards complexation with metals, although its selenide could be prepared and
一系列二烷基氨基和双(二烷基氨基)的配位化学-phosphines,R X P(NR' 2)3 - X (X = 1或2; R =氯,甲基中,Ph,C 6 ˚F 5 ; R' = Et,Pr i),1–7,已进行了研究,所得的6族四羰基和二氯化铂双(膦)复杂的特征。随后,与金属结合的PN键的反应性膦类被探测了。R“ OH(R” = Me,Et,烯丙基)双(dialkylaminodiphenylphosphine)与导致NR'的取代无水HCl气体络合物溶液2由OR“; 分离得到的P-烷氧基配合物,收率极高。酸化乙二醇 解决方案 氨基膦配合物得到相应的双(氯二苯基膦)衍生物。以下的反应的反式- [W(CO)4(P 净2 }博士2)2与]任HCl水溶液或H 2 SO 4,反式- [W(CO)4(P OH}博士2)2 ]可以被隔离为二氯甲烷溶剂化物,收率极高(81%)。双(双(二二烷基氨基
New chiral oxazaphospholidine oxides as highly efficient catalysts in the enantioselective reduction of ketones
作者:Viola Peper、Jürgen Martens
DOI:10.1016/0040-4039(96)01928-4
日期:1996.11
New catalysts 4–10 for the asymmetric reduction of the two model ketones 13 and 14 by borane are described. These catalysts are easily prepared by reaction of the corresponding β-amino alcohols with phenylphosphonic dichloride or alternatively by oxidation of the chiral 1,3,2-oxazaphospholidines. Enantiomeric excesses of 96% in the case of the ω-chloroacetophenone have been obtained using only 1 mol%
Transition-metal chemical shifts in complexes of molybdenum(0) and tungsten(0)
作者:Geoffrey T. Andrews、Ian J. Colquhoun、William McFarlane、Samuel O. Grim
DOI:10.1039/dt9820002353
日期:——
methods respectively for 65 related derivatives of [Mo(CO)6] and [W(CO)6] with (mainly) phosphorus ligands. The chemical shifts of the two nuclei are remarkably parallel, those for l83W being ca. 1.7 times more sensitive to changes in chemical environment than those for 95Mo. The chemical shifts are temperature-dependent, and trends in them can be largely accounted for by variations in the mean electronic
TETRAZINE-CONTAINING COMPOUNDS AND SYNTHETIC METHODS THEREOF
申请人:The Regents of the University of California
公开号:US20160223559A1
公开(公告)日:2016-08-04
Described herein are tetrazine derivatives and efficient synthetic methods of synthesis thereof using elimination-Heck cascade reaction. Provided herein is the synthesis of conjugated tetrazines from the tetrazine derivatives. Also provided herein are methods of use of the conjugated tetrazines as fluorogenic probes for live-cell imaging.