Pentaco-ordinate Phosphorus Compounds by Nucleophilic Addition to Activated Alkenes
The reactions between a variety of trico-ordinate phosphorus compounds and acrylonitrile or ethyl acrylate provide a novel route to pentaco-ordinate phosphorus compounds.
Beer, Paul D.,Edwards, Robert C.,Hall, C. Dennis,Jennings, J. Robert,Cozens, Ross J.
Enantioselective synthesis of putative lipiarmycin aglycon related to fidaxomicin/tiacumicin B
An enantioselective synthesis of a putative lipiarmycin aglycon was accomplished and features: 1) Brown's enantioselective alkoxyallylboration and allylation of aldehydes, 2) chain elongation by iterative Horner-Wadsworth-Emmons olefination, 3) Evans' aldol reaction and 4) an enediene ring-closing metathesis. A neighboring-group-assisted chemoselective reductive desilylation was uncovered in this study and was instrumental to the realization of the present synthesis.
It is an object of the present invention to provide a composition which contains polylactic acid and has excellent heat stability, mechanical strength and color. The composition contains 0.001 to 0.1 part by weight of a metal catalyst and 0.001 to 0.5 part by weight of a phosphono-fatty acid ester based on 100 parts by weight of polylactic acid.
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Page/Page column 9
(2012/09/22)
Synthesis of optically-active phosphono analogs of succinates
The present invention relates to catalytic asymmetric hydrogenation of phosphorus analogs of itaconic acid to synthesize novel optically active phosphono succinates.
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(2008/06/13)
Stereospecific synthesis of tetrasubstituted acrylic esters
Substantially stereospacific (E)-tetrasubstituted acrylic esters, such as STR1 where R is hydrogen alkyl, R1 is alkyl, aryl or aralkyl, R2 and R4 are alkyl, are formed from racemic mixtures of corresponding unsaturated est
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(2008/06/13)
Amino phosphonic acids. 3. The synthesis and properties of 2-aminoethylphosphonic and 3-aminopropylphosphonic acids.
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Isbell,Berry,Tansey
p. 4399 - 4401
(2007/10/10)
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