Palladium(0)-Catalyzed Highly Regio- and Stereoselective Addition of Organoboronic Acids with 1,2-Allenylphosphonates Forming Tri- or Tetrasubstituted 1(<i>E</i>)-Alkenylphosphonates
作者:Shengming Ma、Hao Guo、Fei Yu
DOI:10.1021/jo060672t
日期:2006.8.1
A highly regio- and stereoselective palladium(0)-catalyzed addition of organoboronicacids with 1,2-allenylphosphonates in the presence of HOAc forming tri- or tetrasubstituted 1(E)-alkenylphosphonates is reported in this paper. The stereoselectivity is much higher than the reported cases. The effects of different R1, R2, and R3 were studied. A mechanism of this reaction is proposed on the basis of
Novel, Stereoselective and Stereospecific Synthesis of Allenylphosphonates and Related Compounds via Palladium-Catalyzed Propargylic Substitution
作者:Marcin Kalek、Jacek Stawinski
DOI:10.1002/adsc.201100119
日期:2011.7
allenylphosphonates and related compounds based on a palladium(0)‐catalyzedreaction of propargylic derivatives with H‐phosphonate, H‐phosphonothioate, H‐phosphonoselenoate, and H‐phosphinate esters. The reaction is stereoselective and stereospecific, and provides a convenient entry to a vast array of allenylphosphonates and their analogues with diverse substitution patterns in the allenic moiety and at the phosphorus
Palladium-Catalyzed Propargylic Substitution with Phosphorus Nucleophiles: Efficient, Stereoselective Synthesis of Allenylphosphonates and Related Compounds
A new, efficient method is developed, based on a palladium(0)-catalyzedreaction of propargylic derivatives with various phosphorus nucleophiles, to produce allenylphosphonates and their analogues with defined stereochemistry in the allenic and the phosphonate moiety.
Phosphor- und schwefelsubstituierte allene in der synthese I: einfache synthese von β-ketophosphonaten aus 1-alkin-3-olen
作者:Hans-Josef Altenbach、Rainer Korff
DOI:10.1016/s0040-4039(01)92451-7
日期:1981.1
Allenic phosphonates, readily accessible from 1-alkin-3-ols, the addition products of 1-alkines to aldehydes or ketones, can be transformed to β-ketophosphonates by nucleophilic addition of diethylamine and subsequent hydrolysis of the formed enamines.
The suitability of allenylphosphonates as substrates in phosphane-catalyzedannulation reactions has been investigated. Despite their lower reactivity relative to allenyl esters, allenylphosphonates overall display the anticipated behavior: pyrrolines, tetrahydropyridines, and cyclopentenes bearing phosphoryl functions were obtained from imines, α,β-unsaturated esters, and enones in Bu3P- or iBu3P-promoted