One-pot facile and mild construction of densely functionalized pyrimidines in water <i>via</i> consecutive C–C and C–S bonds formation
作者:Pramod K. Sahu、Praveen K. Sahu、Manvendra S. Kaurav、Mouslim Messali、Saud M. Almutairi、Puran L. Sahu、Dau D. Agarwal
DOI:10.1039/c8ra04363a
日期:——
Fused pyrimidines composed of alternating heteroatoms and a pyrimidine moiety were synthesized efficiently using readily available starting material 4-hydroxycoumarin, aromatic aldehydes, and urea/thiourea at room temperature.
Rapid and mild synthesis of quinazolinones and chromeno[ d ]pyrimidinones using nanocrystalline copper(I) iodide under solvent-free conditions
作者:Shahrzad Abdolmohammadi、Samira Karimpour
DOI:10.1016/j.cclet.2015.08.014
日期:2016.1
very simple, efficient synthesis of quinazolinones and chromeno[ d ]pyrimidinones from the reaction of aryl aldehydes, urea/thiourea and active methylene compounds (dimedone/4-hydroxycoumarin) using nano-sized CuI particles under solvent-free conditions. The highlights of this new method are based on using an effective and recyclable catalyst, affording high yields of products, mild reaction conditions
Bio-assisted synthesized Ag(0) nanoparticles immobilized on SBA-15/cyclodextrin nanosponge adduct: Efficient heterogeneous catalyst for the ultrasonic-assisted synthesis of benzopyranopyrimidines
作者:Samahe Sadjadi、Majid M. Heravi、Masoumeh Malmir
DOI:10.1002/aoc.4286
日期:2018.4
SBA‐15/cyclodextrin nanospongeadduct was synthesized through reaction of Cl‐functionalized SBA‐15 and amine‐functionalized cyclodextrin nanosponge (CDNS). This adduct, which benefits from features of both SBA‐15 and CDNS, was then used for immobilization of Ag(0) nanoparticles which were prepared and capped using a bio‐based approach. Ag@CDNS–SBA‐15 was applied as a heterogeneouscatalyst for promoting
A Facile and Efficient Tamarind Juice Catalyzed One-Pot Synthesis of Benzopyranopyrimidines in Aqueous Medium Just by Grinding: A Green Chemistry Approach
作者:Y. I. Shaikh、S. S. Shaikh、Khursheed Ahmed、G. M. Nazeruddin、V. S. Shaikh
DOI:10.13005/ojc/360308
日期:2020.6.30
A comprehensive and efficient Tamarind (Tamarindous indica) juice catalysed one pot synthesis of benzopyranopyrimidines in aqueous medium through condensation of 4-Hydroxycoumarin (10mmol), various substituted benzaldehydes (10mmol)) and urea/thiourea (20mmol) just by grinding at ambient condition is reported in excellent yield of the product. This is a green chemistry approach, which is need of the hour.
AN EFFICIENT SYNTHESIS OF BENZOPYRANOPYRIMIDINES USING INORGANIC SOLID SUPPORT
作者:Mazaahir Kidwai、Pooja Sapra
DOI:10.1081/scc-120004253
日期:2002.1
4-Hydroxycoumarin on reaction with aldehydes in the presence of urea/thiourea using solid inorganic support under microwave irradiation (MWI) afforded 4-substituted benzopyrano [4,3-d]- pyrimidine derivatives in a few seconds with improved yield as compared to conventional heating. This efficient, facile and ecofriendly technique avoids the use of excess solvent and toxic acids usually employed in the process.