Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Ahmed A. M. Sarhan"'
Autor:
Eid E. Salama, Mohamed F. Youssef, Ahmed Aboelmagd, Ahmed T. A. Boraei, Mohamed S. Nafie, Matti Haukka, Assem Barakat, Ahmed A. M. Sarhan
Publikováno v:
Pharmaceuticals, Vol 16, Iss 12, p 1724 (2023)
According to data provided by the World Health Organization (WHO), a total of 2.3 million women across the globe received a diagnosis of breast cancer in the year 2020, and among these cases, 685,000 resulted in fatalities. As the incidence of breast
Externí odkaz:
https://doaj.org/article/aa3e43f9a4254fa0810e37d177fa1e37
Autor:
Ahmed A. M. Sarhan, Matti Haukka, Assem Barakat, Saied M. Soliman, Ahmed T. A. Boraei, Manar Sopaih, Eid E. Salama
Publikováno v:
Crystals, Vol 13, Iss 11, p 1537 (2023)
The synthesis of 4-methyl/phenyl-1,2,5,6-tetraazafluoranthen-3(2H)-one 4 and 7 has been reported with ninhydrin via a reaction first with ethyl acetoacetate or ethyl benzoylacetate and then a reaction of the resultant esters with hydrazine hydrate. T
Externí odkaz:
https://doaj.org/article/641a419da0224a2791c8768470d70adc
Autor:
Eid E. Salama, Mohamed F. Youssef, Ahmed T. A. Boraei, Matti Haukka, Saied M. Soliman, Assem Barakat, Ahmed A. M. Sarhan
Publikováno v:
Crystals, Vol 13, Iss 7, p 992 (2023)
The regiospecific S-benzylation/allylation of two 4-aryl-5-indolyl-1,2,4-triazole-3-thione precursors was carried out using Et3N as a base. Allyl group migration from exocyclic sulfur to the triazole nitrogen (N3) was successfully achieved in a short
Externí odkaz:
https://doaj.org/article/235ade72d7d540909ae4ea6d5ce0d00b
Publikováno v:
ACS Omega, Vol 5, Iss 10, Pp 5436-5442 (2020)
Externí odkaz:
https://doaj.org/article/ff6b8c903de8440c94b6ca588da065cb
Autor:
Ahmed T. A. Boraei, Matti Haukka, Manar Sopaih, Abdullah Mohammed Al-Majid, Saied M. Soliman, Assem Barakat, Ahmed A. M. Sarhan
Publikováno v:
Crystals, Vol 12, Iss 2, p 262 (2022)
A straightforward one-pot route for the synthesis of a new 4-phenyl-1,2,5,6-tetraazafluoranthen-3(2H)-one is reported form the direct hydrazinolysis of triketo ester and hydrazine hydrate in ethanol. 4-Phenyl-1,2,5,6-tetraazafluoranthen-3(2H)-one was
Externí odkaz:
https://doaj.org/article/6085872c29794f99968522545bc02695
Autor:
Ahmed T. A. Boraei, Matti Haukka, Ahmed A. M. Sarhan, Saied M. Soliman, Abdullah Mohammed Al-Majid, Assem Barakat
Publikováno v:
Symmetry, Vol 13, Iss 9, p 1646 (2021)
The synthesis of C2-symmetrical bis(β-enamino-pyran-2,4-dione) derivative 3 connected via 1,6-hexylene linker was reported for the first time. X-ray structures and Hirshfeld studies of the new bis- β-enamino-pyran-2,4-dione derivative 3 along with
Externí odkaz:
https://doaj.org/article/9e34e68e605f42c19b5b296b9ff334d2
Autor:
Ahmed T. A. Boraei, Matti Haukka, Ahmed A. M. Sarhan, Saied M. Soliman, Abdullah Mohammed Al-Majid, Assem Barakat
Publikováno v:
Crystals, Vol 11, Iss 8, p 953 (2021)
A new compounds named 3-4′-bipyrazoles 2 and 3 were synthesized in high chemical yield from a reaction of pyran-2,4-diketone 1 with aryl hydrazines under thermal conditions in MeOH. Compound 2 was unambiguously confirmed by single-crystal X-ray ana
Externí odkaz:
https://doaj.org/article/fe3969e1da1947058f853cb59050d35c
Publikováno v:
Crystals, Vol 11, Iss 8, p 896 (2021)
Intra and intermolecular interactions found in the developed crystals of the synthesized py-ron-2,4-dione derivatives play crucial rules in the molecular conformations and crystal stabili-ties, respectively. In this regard, Hirshfeld calculations wer
Externí odkaz:
https://doaj.org/article/b69f26949355468284d7d1aa542d0ff4
Publikováno v:
Molecules, Vol 25, Iss 3, p 450 (2020)
A new series of nitrogen and sulfur heterocyclic systems were efficiently synthesized by linking the following four rings: indole; 1,2,4-triazole; pyridazine; and quinoxaline hybrids. The strength of the acid that catalyzes the condensation of 4-amin
Externí odkaz:
https://doaj.org/article/dd3f15090f214f8cb2f02dc375ced91a
Publikováno v:
RSC Advances. 10:19534-19541
Herein, the mono and dialkylation of pyridazino[4,5-b]indole were achieved with a set of alkylating agents, including amyl bromide, allyl bromide, benzyl bromide and ethyl chloroacetate in the presence of K2CO3/acetone or KOH/DMSO. The hydrazinolysis