Mn(OAc)<sub>3</sub>-Promoted Oxidative C<sub>sp<sup>3</sup></sub>–P Bond Formation through C<sub>sp<sup>2</sup></sub>–C<sub>sp<sup>2</sup></sub> and P–H Bond Cleavage: Access to β-Ketophosphonates
The Mn(OAc)3-promoted oxidative phosphonylation of N,N-dimethylenaminones with H-phosphonates, involving a chemo- and regioselective Csp2–Csp2 bond cleavage and Csp3–P bond formation in one step, provided successfully functionalized β-ketophosphonates under mild reaction conditions. Oxidative Csp3–H/P–H cross-coupling reactions via Csp3–C(C═O) bond cleavage and mechanistic studies are conducted preliminarily
MnIII-catalyzed functionalization of vinyl azides via phosphorylation was developed to synthesize various β-keto phosphine oxides in high yields. The transformation is operated in mild conditions and tolerant of a range of functional groups. Control reaction indicates that the reaction mechanism might proceed via the generation of a phosphonated iminyl radical intermediate.
Asymmetric Synthesis of (−)-Indolizidines 167B and 209D Based on Stereocontrolled Allylation of a Chiral Tricyclic <i>N</i>-Acyl-<i>N,O-</i>acetal
作者:Naoki Yamazaki、Toshimasa Ito、Chihiro Kibayashi
DOI:10.1021/ol990389z
日期:2000.2.1
chiral (5S)-allylpyrrolidinone with retention of configuration in high yield and diastereoselectivity. On the bases of this methodology, the asymmetric syntheses of the dendrobatid alkaloids (-)-indolizidines167B and 209D were achieved.
Gamma lactams as prostaglandin agonists and use thereof
申请人:Araldi Luca Gian
公开号:US20050288357A1
公开(公告)日:2005-12-29
1,2-substituted 5-pyrrolidinone compounds are provided, and methods of treatment and pharmaceutical composition that utilize or comprise one or more such compounds. Compounds of the invention are useful for a variety of therapies, including treating or preventing preterm labor, dysmenorrhea, asthma, hypertension, infertility or fertility disorder, undesired blood clotting, preeclampsia or eclampsia, an eosinophil disorder, sexual dysfunction, osteporosis and other destructive bone disease or disorder, renal dysfunction, an immune deficiency disorder, dry eye, ichthyosis, elevated intraocular pressure, sleep disorder, or gastric ulcer, inflammatory disorders and other diseases and disorders associated with the prostaglandin family of compounds.
β-Ketophosphonate Formation via Aerobic Oxyphosphorylation of Alkynes or Alkynyl Carboxylic Acids with H-Phosphonates
作者:Mingxin Zhou、Ming Chen、Yao Zhou、Kai Yang、Jihu Su、Jiangfeng Du、Qiuling Song
DOI:10.1021/acs.orglett.5b00574
日期:2015.4.3
A synergistic Cu/Fe-catalyzed aerobic oxyphosphorylation of alkynes or alkynyl carboxylic acids with H-phosphonate is disclosed. The useful beta-ketophosphonate products were obtained in good yields under oxygen atmosphere in a novel way. This reaction exhibits a wide substrate scope, and the mechanistic experiments indicate that a radical mechanism forms both C-P and C=O bonds simultaneously. This mechanism contrasts existing aerobic difunctionalization of alkynes.