4998-50-9Relevant academic research and scientific papers
Eco-friendly organocatalyst- And reagent-controlled selective construction of diverse and multifunctionalized 2-hydroxybenzophenone frameworks for potent UV-A/B filters by cascade benzannulation
Akhtar, Muhammad Saeed,Inductivo Tamargo, Ramuel John,Kim, Sung Hong,Lee, Yong Rok,Thombal, Raju S.,Yang, Won-Guen
supporting information, p. 4523 - 4531 (2020/08/10)
The organocatalyst- and reagent-controlled highly selective synthesis of diversely functionalized novel 2-hydroxybenzophenone frameworks, such as 2-hydroxy-3′-formylbenzophenones, 7-(2′-hydroxybenzoyl)-2-naphthaldehydes, and 2-hydroxybenzophenones, under green conditions, for the development of potent UV-A/B filters is described. The organocatalyzed benzannulation reactions proceed individually via [3 + 3] cycloaddition for the synthesis of 2-hydroxy-3′-formylbenzophenones and [4 + 2] cycloaddition for 2-hydroxybenzophenones. With this methodology, an unprecedented double benzannulation allows one-pot construction of diverse 7-(2′-hydroxybenzoyl)-2-naphthaldehydes via [3 + 3 + 4] cycloaddition. This protocol features a broad substrate scope, high functional-group tolerance, and operational simplicity in an environmentally benign green solvent. The synthesized compounds are successfully utilized for further transformations and well characterized as potent UV-A/B filters.
Ruthenium-Catalyzed Direct Asymmetric Reductive Amination of Diaryl and Sterically Hindered Ketones with Ammonium Salts and H2
Hu, Le' an,Zhang, Yao,Zhang, Qing-Wen,Yin, Qin,Zhang, Xumu
, p. 5321 - 5325 (2020/02/28)
A Ru-catalyzed direct asymmetric reductive amination of ortho-OH-substituted diaryl and sterically hindered ketones with ammonium salts is reported. This method represents a straightforward route toward the synthesis of synthetically useful chiral primary diarylmethylamines and sterically hindered benzylamines (up to 97 % yield, 93–>99 % ee). Elaborations of the chiral amine products into bioactive compounds and a chiral ligand were demonstrated through manipulation of the removable and convertible -OH group.
Iridium- and rhodium-catalyzed C-H activation and formyl arylation of benzaldehydes under chelation-assistance
Yang, Xifa,Wang, He,Zhou, Xukai,Li, Xingwei
supporting information, p. 5233 - 5237 (2016/07/06)
Mild and efficient synthesis of benzophenones via Ir(iii)- and Rh(iii)-catalyzed, directing group-assisted formyl C-H arylation of benzaldehydes has been achieved using diaryliodonium salts, in which Rh(iii) and Ir(iii) catalysts exhibited a complementary
New Methodology for the Synthesis of Xanthones
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Paragraph 0020; 0021; 0042, (2014/05/07)
Methods are provided for forming a xanthone derivative via reacting a 2-substituted benzaldehyde with a phenol derivative to form the xanthone derivative.
Copper-catalyzed ortho-acylation of phenols with aryl aldehydes and its application in one-step preparation of xanthones
Hu, Jun,Adogla, Enoch A.,Ju, Yong,Fan, Daping,Wang, Qian
supporting information, p. 11256 - 11258 (2013/01/15)
In the presence of triphenylphosphine, copper(ii) chloride can catalyze an intermolecular ortho-acylation reaction of phenols with aryl aldehydes. The reaction proceeds smoothly with a wide range of starting materials, and furthermore, it can be used to s
A concise approach to the preparation of 2-hydroxydiarylketones by an intramolecular acyl radical ipso substitution
Motherwell,Vazquez
, p. 9667 - 9671 (2007/10/03)
Substituted 2-hydroxydiarylketones have been simply prepared using an intramolecular acyl radical [1,6] ipso substitution reaction. (C) 2000 Elsevier Science Ltd.
