Asymmetric Synthesis of 2H-Azirines Derived from Phosphine Oxides Using Solid-Supported Amines. Ring Opening of Azirines with Carboxylic Acids
摘要:
A simple and efficient asymmetric synthesis of 2H-azirine-2-phosphine oxides 3 is described. The key step is a solid-phase bound achiral or chiral amine-mediated Neber reaction of beta-ketoxime tosylates derived from phosphine oxides 1. Reaction of 2H-azirines 3 and 11 with carboxylic acids 4 gives phosphorylated ketamides 5 and 12. Ring closure of ketamides 5 and 12 with triphenylphosphine and hexachloroethane in the presence of triethylamine leads to the formation of phosphorylated oxazoles 8 and 13.
Synthesis of α-Aminophosphonic Acid Derivatives Through the Addition of O- and S-Nucleophiles to 2H-Azirines and Their Antiproliferative Effect on A549 Human Lung Adenocarcinoma Cells
作者:Victor Carramiñana、Ana M. Ochoa de Retana、Francisco Palacios、Jesús M. de los Santos
DOI:10.3390/molecules25153332
日期:——
phosphonate acetals after N–C3 ringopening of the intermediate aziridine. However, addition of 2,2,2-trifluoroethanol, phenols, substituted benzenthiols or ethanethiol to 2H-azirine phosphine oxides or phosphonates yields allylic α-aminophosphine oxides and phosphonates in good to high general yields. In some cases, the intermediate aziridine attained by the nucleophilic addition of O- or S-nucleophiles
Reaction of 2<i>H</i>-Azirine-Phosphine Oxides and -Phosphonates with Enolates Derived from β-Keto Esters
作者:Ander Vélez del Burgo、Ana M. Ochoa de Retana、Jesús M. de los Santos、Francisco Palacios
DOI:10.1021/acs.joc.5b02347
日期:2016.1.4
Cyclopenta[b]-pyrrole-2-phosphine oxides 4a and -phosphonates 4b,c are generated by the addition of cyclic enolatesderivedfrom ethyl 2-oxo-cyclopentanecarboxylate 2 to phosphorated 2H-azirines 1. However, the addition of enolatederivedfrom acyclic 2-oxo-butanoate 10 to 2H-azirine phosphine oxide 1 led to vinylogous N-acyl-α-aminoalkyl phosphine oxides 12, involving the carbonyl group and the Cα
环戊二烯并[ b ]吡咯-2-膦氧化物4A和-phosphonates 4B,Ç通过加入选自乙基-2-氧代环戊烷羧酸衍生的烯醇化物的循环而产生2至磷化2 ħ -azirines 1。然而,将衍生自无环2-氧代丁酸酯10的烯醇盐添加至2 H-叠氮基氧化膦1导致乙烯基的N-酰基-α-氨基烷基氧化膦12,其涉及酮酸酯10的羰基和Cα 。乙烯基衍生物12的闭环在碱的存在下提供吡咯-2-氧化膦11。将茚满酮羧酸盐15衍生的烯醇盐添加到2 H- azirines 1中,导致形成官能化的N-取代的1 H-苯并[ d ]氮杂衍生物17。
First synthesis of merged hybrids phosphorylated azirino[2,1-b]benzo[e][1,3]oxazine derivatives as anticancer agents
作者:Victor Carramiñana、Ana M. Ochoa de Retana、Jesús M. de los Santos、Francisco Palacios
DOI:10.1016/j.ejmech.2019.111771
日期:2020.1
to azirino[2,1-b]benzo[e][1,3]oxazines containing phosphorus substituents such as phosphonate or phosphine oxide, by means of nucleophilic addition of functionalized phenols to the C-N double bond of 2H-azirine derivatives. In addition, the cytotoxic effect on cell lines derived from human lung adenocarcinoma (A549) and human embryonic kidney (HEK293) was also screened. Some azirino[2,1-b]benzo[e][1
Regioselective synthesis of 4- and 5-oxazole-phosphine oxides and -phosphonates from 2H-azirines and acyl chlorides
作者:Francisco Palacios、Ana M. Ochoa de Retana、José I. Gil、José M. Alonso
DOI:10.1016/j.tet.2004.07.013
日期:2004.9
A simple and efficient regioselective synthesis of 4-oxazole-phosphine oxides 11 and -phosphonates 12 from 2H-azirine-phosphine oxides 1 and -phosphonates 6 is described. The key step for the synthesis of oxazoles 11 is a base-mediated ring closure of vinylogous α-aminophosphorus compounds derived from phosphine oxides 4 and from phosphonates 8. These derivatives 4 and 8 are obtained by reaction of
Synthesis of Pyrazine-phosphonates and -Phosphine Oxides from 2<i>H</i>-Azirines or Oximes
作者:Francisco Palacios、Ana María Ochoa de Retana、José Ignacio Gil、Rafael López de Munain
DOI:10.1021/ol0261534
日期:2002.7.1
[reaction: see text] Tetrasubstituted pyrazines containing two phosphonate groups 2 in positions 2 and 5 and trisubstituted pyrazines containing a phosphonate 5 or a phosphine oxide group 7 in position 2 are obtained by thermal treatment of 2H-azirine-2-phosphonates 1 and -phosphine oxides 6. These pyrazines can also be prepared from beta-ketoxime tosylates 9 and 10 or from oxime derived from phosphine