Reactions of 2-phospholene 1-oxides with N-bromoacetamide in aqueous organic solvent produced 2-bromo-3-hydroxyphospholane 1-oxides, which reacted with sodium salts of dialkyl phosphonates to afford novel 2-phosphinoylphospholane 1-oxide derivatives. A 4-phosphin-oyl-2-phospholene derivative was also prepared.
Experimental and computational studies on the formation and biological properties of the simplest polyfluoroalkyl phosphonates
作者:Piotr M. Zagórski、Paulina Tokarz、Bartłomiej Gostyński、Paweł Tokarz
DOI:10.1039/d0nj00963f
日期:——
and quantum-theoretical (DFT) investigations were performed to reveal that the studied compounds could not be obtained through the standard Michaelis–Arbuzov or Michaelis–Becker reactions. Kinetic studies showed that trimethyl phosphite undergoes a reaction with 1,1,1-trifluoro-2-iodoethane several orders of magnitude slower than a side reaction. The difficulty was overcome by developing a simple three-step
HYPERVALENT IODINE IN SYNTHESIS. 49. A NEW EFFECTIVE SYNTHESIS OF Se-PHENYL<i>O,O</i>-DIALKYL PHOSPHOROSELENOATES WITH POLYMER-SUPPORTED PHENYLIODINE DIACETATE
作者:Da-Jun Chen、Zhen-Chu Chen
DOI:10.1081/scc-100000533
日期:2001.1
Se-phenyl O,O-dialkyl phosphoroselenoates have been prepared by the one-pot reaction of sodium O,O-dialkyl phosphorates, diphenyl diselenide, and polymer-supported phenyliodine diacetate (PPID).
Abstract The reaction of β-diketones, ethylacetoacetare and malononitrile with α, β-insaturated β, β-difunctionnalized phosphonates constitutes a performant newroute leading to the formation of substituted 2-amino-4-phosphono-4H-pynnes. Moreover the reaction of dialkylphosphonates with 2-hydroxybenzylidenemalononitrile affords a new series of phosphorylated benzopyranes.
serine/threonine phosphatase (proteinphosphatase 1 and 2A) inhibitors constitute a biologically and structurally interesting class of natural products. Among this class of inhibitors are cyclicpentapeptides (nodularins) and cyclic heptapeptides (microcystins), both of which inhibit at the nanomolar level and are the only peptide inhibitors of these enzymes. Described herein is the total synthesis of motuporin