[EN] METHOD FOR THE SYNTHESIS OF AMINOALKYLENEPHOSPHONIC ACID<br/>[FR] PROCÉDÉ DE SYNTHÈSE D'ACIDE AMINOALKYLÈNEPHOSPHONIQUE
申请人:STRAITMARK HOLDING AG
公开号:WO2014012987A1
公开(公告)日:2014-01-23
The present invention is related to a method for the synthesis of an aminoalkylenephosphonic acid or its phosphonate esters comprising the following steps: a) forming, in the presence of an aldehyde or ketone and an acid catalyst, a reaction mixture by mixing a compound comprising at least one HNR1R2 moiety or a salt thereof, with a compound having one or more P-O-P anhydride moieties, said moieties comprising one P atom at the oxidation state (+III) and one P atom at the oxidation state (+III) or (+V), wherein the ratio of moles of aldehyde or ketone to N-H moieties is 1 or more and wherein the ratio of N-H moieties to P-O-P anhydride moieties is 0.3 or more and, b) recovering the resulting aminoalkylenephosphonic acid comprising compound or its phosphonate esters.
Asymmetrische reduktive Aminierung von Cycloalkanonen, 10. Mitt.: EPC-Synthesecis-bicyclischer Lactame und Amine
作者:Farghaly Omar、August W. Frahm
DOI:10.1002/ardp.19903231109
日期:——
Ausgangsverbindungen 4 werden aus den racemischen Cycloalkanon‐2‐essig‐ bzw. 2‐propionsäureestern 1 und den chiralen Hilfsaminen R‐(+)‐ bzw. S‐(−)‐1‐Phenylethylamin durch dreistufige asymmetrische Synthesen gewonnen1). Die relative Konfiguration der Verbindungen 5 und 6 wurde durch 1H‐NMR‐Spektroskopie, die optische Reinheit der optisch aktiven cis‐bicyclischen Amin‐Hydrochloride 6 durch HPLC der entspr. Mosher‐Amide
Tin-free visible light photoredox catalysed cyclisation of enamides as a mild procedure for the synthesis of γ-lactams
作者:Eleonora Fava、Masaki Nakajima、Martin B. Tabak、Magnus Rueping
DOI:10.1039/c6gc01099g
日期:——
A visible light mediated tin-free 5-endo-trig cyclisation of [small alpha]-chloroenamides, leading to synthetically valuable [gamma]-lactams in good yields and high diastereomeric ratios, was developed.
METHOD FOR THE SYNTHESIS OF AMINOALKYLENEPHOSPHONIC ACID
申请人:STRAITMARK HOLDING AG
公开号:US20150225431A1
公开(公告)日:2015-08-13
A method for the synthesis of an aminoalkylenephosphonic acid or its phosphonate esters including the following steps: a) forming, in the presence of an aldehyde or ketone and an acid catalyst, a reaction mixture by mixing a compound having at least one HNR
1
R
2
moiety or a salt thereof, with a compound having one or more P—O—P anhydride moieties, the moieties having one P atom at the oxidation state (+III) and one P atom at the oxidation state (+III) or (+V), wherein the ratio of moles of aldehyde or ketone to N—H moieties is 1 or more and wherein the ratio of N—H moieties to P—O—P anhydride moieties is 0.3 or more, and b) recovering the resulting aminoalkylenephosphonic acid having compound or its phosphonate esters.
and economical one-pot approach to chiral fused tricyclic lactams from readily available ketoesters was developed by using cheap ammonium salts as the nitrogen source through ruthenium-catalyzed tandem dynamic kinetic asymmetric reductive amination/lactamization. This protocol provides highly efficient access to drug intermediates and organocatalysts containing chiral polycyclic N-heterocycles.