Lewis Acid Catalyzed Synthesis of 1-Aryl-1,2-dihydro-naphtho[1,2-e][1,3]oxazin-3-ones under Solvent Free Conditions: A Mechanistic Approach
作者:Mukul Sharma、Sunny Manohar、Diwan S. Rawat
DOI:10.1002/jhet.825
日期:2012.5
Lewisacidscatalyzed highly efficient one‐pot three component coupling of β‐naphthol, benzaldehydes and urea to produce 1‐aryl‐1,2‐dihydro‐naphtho[1,2‐e][1,3]oxazin‐3‐one derivatives under solvent free conditions is described. Mechanistic studies confirmed that product formation is possible only at very high temperature (140–150°C) and at lower temperature (90–100°C) formation of 14‐aryl‐14H‐dibenzo(a
路易斯酸催化β-萘酚,苯甲醛和尿素的高效一锅三组分偶联,生成1-芳基-1,2-二氢萘并[1,2-e] [1,3]恶嗪-3-酮衍生物描述了在无溶剂条件下。机理的研究证实,产物形成可以仅在非常高的温度(140-150℃),并在较低的温度下(90-100℃)的14 -芳基- 14形成ħ -二苯并(A,j)的观察到的呫吨。在筛选的九种路易斯酸中,碘,P 2 O 5和Yb(OTf)3被发现是该多组分反应最有效的催化剂。
Synthesis of naphthoxazinone derivatives using silica-bonded S-sulfonic acid as catalyst under solvent-free conditions
作者:KHODABAKHSH NIKNAm、PARISA ABOLPOUR
DOI:10.1007/s12039-015-0895-x
日期:2015.7
Silica-bonded S-sulfonic acid is employed as a recyclablecatalyst for the synthesis of naphthoxazinone derivatives from the reaction of ß-naphthol, aromatic aldehydes and urea at 150°C under solvent-free conditions. The heterogeneous catalyst was recycled for five runs after the reaction of ß-naphthol, benzaldehyde and urea without losing its catalytic activity. Silica-bonded S-sulfonic acid was employed
A one-pot synthesis of 1,2-dihydro-1-arylnaphtho[1,2-e][1,3]oxazine-3-ones catalyzed by iron(III) phosphate under solvent-free condition
作者:Parisa Rahmani、Farahnaz K. Behbahani
DOI:10.1080/15533174.2016.1216452
日期:2017.5.4
An efficient greenroute for the preparation of naphthoxazinones, applying a three-component one-pot condensation reaction of 2-naphthol, aromatic aldehyde, and urea in the presence of iron(III) phosphateunder solvent-free conditions, has been developed. The present procedure offers several advantages such as short reaction time, simple workup, recovery, and reusability of the catalyst. In addition
AgI nanoparticles as a remarkable catalyst in the synthesis of (amidoalkyl)naphthol and oxazine derivatives: an eco-friendly approach
作者:Javad Safaei Ghomi、Safura Zahedi、Mohammad Ali Ghasemzadeh
DOI:10.1007/s00706-014-1184-y
日期:2014.7
AgI nanoparticles were discovered to be an effectual heterogeneous nanocatalyst for the preparation of (amidoalkyl)naphthol and oxazine derivatives under solvent-free conditions. The advantages of the present approach are short reaction times, moderate temperature, premier yields, eco-friendly reaction conditions, simple purification and good reusability of the catalyst.