Results 101 to 110 of about 3,167 (267)

Pivalic acid assisted Biginelli reaction for synthesis of dihydropyrimidinones and dihydrothiopyrimidinones     [PDF]

, 2021
Herein is provided an alternate, simple, multigram scale, efficient route for Biginelli reaction for synthesis of dihydropyrimidinones using urea, ethylacetatoacetate, and benzaldehyde with pivalic ...
Anveka, Tushar S, Chodankar, Anika Arjun, Gaonkar, Saurabh Sudan, Gawas, Anushri Laxman, Kadam, Hari K, Mhaldar, Shashank N, Salgaonkar, Lalitprabha N, Vaz, Teotone , Vernekar, Shruti Sagun   +8 more
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Secondary amine-initiated three-component synthesis of 3,4-dihydropyrimidinones and thiones involving alkynes, aldehydes and thiourea/urea

Beilstein Journal of Organic Chemistry, 2014
The three-component reactions of aldehydes, electron deficient alkynes and ureas/thioureas have been smoothly performed to yield a class of unprecedented 3,4-dihydropyrimidinones and thiones (DHPMs).
Jie-Ping Wan, Yunfang Lin, Kaikai Hu, Yunyun Liu   +3 more
doaj   +1 more source

MICROWAVE ASSISTED GREEN SYNTHESIS OF PHARMACEUTICALLY IMPORTANT DIHYDROPYRIMIDINONES IN FRUIT JUICE MEDIUM [PDF]

, 2015
Objective: The objective of this research project was to perform the green synthesis of a series of Dihydropyrimidinone (DHPM) derivatives which are having immense importance in biological and pharmaceutical science, via microwave assisted Biginelli ...
Maji, Poulami, Pramanik, Tanay
core  

Recent synthetic and medicinal perspectives of dihydropyrimidinones: A review

European Journal of Medicinal Chemistry, 2017
Dihydropyrimidines are the most important heterocyclic ring systems which play an important role in the synthesis of DNA and RNA. Synthetically they were synthesized using Multi-component reactions like Biginelli reaction and Hantzschdihydropyridine.
Kaur, Ramandeep, Chaudhary, Sandeep, Kumar, Kapil, Gupta, Manish K., Rawal, Ravindra K.   +4 more
openaire   +2 more sources

Multicomponent Reactions for the Preparation of Fluorous Taged Pyrimidines and Thiopyrimidines and their Derivatisation to Obtain Biaryl-Substituted Heterocycles [PDF]

, 2011
This thesis presents a work in the field of multicomponent reactions (MCRs), one-step condensation between a fluorous tagged aldehyde, β-keto ester and urea derivatives. This process in literature is known as Biginelli Reaction .
Piqani, Bruno
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Multicomponent Synthesis and Evaluation of New 1,2,3-Triazole Derivatives of Dihydropyrimidinones as Acidic Corrosion Inhibitors for Steel

Molecules, 2016
An efficient one-pot synthesis of 1,2,3-triazole derivatives of dihydropyrimidinones has been developed using two multicomponent reactions. The aldehyde-1,2,3-triazoles were obtained in good yields from in situ-generated organic azides and O ...
Rodrigo González-Olvera, Viridiana Román-Rodríguez, Guillermo E. Negrón-Silva, Araceli Espinoza-Vázquez, Francisco Javier Rodríguez-Gómez, Rosa Santillan   +5 more
doaj   +1 more source

Solvent free one pot synthesis of novel naphtho[1,8-gh] quinazoline-7,10-dione derivatives with CuCl2 [PDF]

, 2018
The Biginelli-type reaction of phenalen-1,3-dione with urea, and benzaldehyde derivatives in the presence of CuCl2 as a catalyst for the synthesis of naphtho[1,8-gh]quinazoline-7,10-diones in solvent free condition are reviewed.
K. Mohammadi, M.
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Microwave induced synthesis of some fused thiazoloquinazoline derivatives under solvent free conditions using LiBr as a catalyst [PDF]

Two rapid and efficient methods for the preparation off used thiazoloquinazoline derivatives by the reaction of chalcones with hydroxylamine, urea and hydrazine hydrate under solvent free condition and microwave exposure are reported.
Ameta, Chetna, Ameta, Rakshit, Ameta, Suresh, Punjabi, P., Tiwari, Urvashi   +4 more
core  

A Green and Efficient Method for the Preparation of 3,4-Dihydropyrimidin-2(1 H [PDF]

, 2013
A variety of 3,4-dihydropyrimidin-2(1H)-ones derivatives were synthesized via three-component Biginelli reaction. The quaternary ammonium-treated clay-catalyzed process proved to be simple, efficient, and environmentally ...
Sedigheh Jahanbakhshi, Soheil Sayyahi, Zahra Dehghani   +2 more
core   +2 more sources

Recent developments in chemical reactivity of N,N-dimethylenamino ketones as synthons for various heterocycles [PDF]

, 2017
The current review presents recent progress in the utility of N,N-dimethyl enaminones as building blocks for a diverse range of acyclic, carbocyclic, five- and six-membered heterocyclic a broad range of heterocyclic and fused heterocyclic derivatives ...
Abbas, Abdallah, Abdallah, Abdallah, Abdel-Khalik, Abdel-Khalik, Abdel-Khalik, Abdel-Megid, Abdel-Motaleb, Abdel-Motaleb, Abdelhamid, Abdelhamid, AbdelKhalik, Abu-Shanab, Abu-Shanab, Adams, Agamy, Agamy, Al-Awadi, Al-Awadi, Al-Awadi, Al-Enezi, Al-Etaibi, Al-Mousawi, Al-Mousawi, Al-Mousawi, Al-Mousawi, Al-Mousawi, Al-Mousawi, Al-Mousawi, Al-Omran, Al-Omran, Al-Omran, Al-Omran, Al-Omran, Al-Omran, Al-Omran, Al-Omran, Al-Saleh, Al-Saleh, Al-Saleh, Al-Saleh, Al-Saleh, Al-Saleh, Al-Saleh, Al-Saleh, Al-Shiekh, Al-Shiekh, Al-Shiekh, Al-Zaydi, Al-Zaydi, Al-Zaydi, Al-Zaydi, Al-Zaydi, Al-Zaydi, Al-Zaydi, Alinezhad, Alinezhad, Almazroa, Anwer, Behbehani, Cao, Dawood, Domínguez, El-Desoky, El-Dusouqui, El-Taweel, Eldebss, Elghamry, Farghaly, Figueiredo, Gaber, Gaber, Gaber, Gaber, Gaber, Gaber, Gad-Elkareem, Gad-Elkareem, Ghozlan, Ghozlan, Ghozlan, Gomha, Gomha, Gomha, Gomha, Gomha, Greenhill, Hassanien, Hassanien, Hassanien, Hernández, Ho, Ho, Ho, Hughes, Ibrahim, Igarashi, Ingham, Jiang, Kandeel, Kantevari, Kascheres, Katritzky, Katritzky, Kenawi, Kepe, Kepe, Kim, Kirschbaum, Liu, Lue, Macba, Macba, Makhseed, Manley, Martins, Michael, Mokhtar, Mousawi, Moustafa, Mukhanova, Murphy, Negri, Nishimura, Nishiyama, Pichon, Pigge, Pleier, Raghunadh, Rasmussen, Reidlinger, Sabnis, Saleh, Salomone, Schenone, Shaaban, Shankaraiah, Sherif, Toche, Tois, Trautwein, Verma, Wan, Wan, Wan, Wan, Wan, Wang, Witherington, Xiang, Zhao, Zhou, Šimůnek   +153 more
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