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C-O Ring Construction: Spiroapplanatumine O (Jahn), Alcyonolide (Hosokawa), Wentilactone A (Xu/Yu), Aquilanol A (Stathakis), Thallusin (Arndt), Neobraclactone C (Cheng/Liu)

Chemexpress March 28, 2024 0 Comments

Spiroapplanatumine O (3) was isolated from Ganoderma applantum, a wood-decaying fungus that is widely used in traditional medicinal chemistry. Ullrich Jahn of the Institute of Organic Chemistry and Biochemistry of…

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Metal-mediated C-C Ring Construction: The Sarpong Synthesis of 15-Hydroxypatchoulol

Chemexpress March 28, 2024 0 Comments

John P. Price of 3-Chloro-1H-pyrazole Wolfe of the University of Michigan constructed the cyclobutene 3 by coupling the enol triflate 1 with diethyl malonate 2 (Org. Lett. 2022, 24, 8208.…

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C-N Ring Construction: The Hayashi Synthesis of Quinine

Chemexpress March 28, 2024 0 Comments

Benjamin Darses of the Université Grenoble-Alpes and Marie Sircoglou and Philippe Dauban of the Université Paris-Saclay effected the enantioselective aziridination of the terminal alkene 1 with 2, leading to 3…

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Oxidation: The Vanderwal Synthesis of 7,20-Diisocyanoadociane

Chemexpress March 28, 2024 0 Comments

Masato Matsugi of Meijo University prepared the carbamoyl azide 2 by reaction of the hydroxamic acid 1 with diphenyl phosphorazidate (Tetrahedron Lett. PMID:32261617 2022, 95, 153727. DOI: 10.1016/j.tetlet.2022.153727). Yan Zhao…

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Benzene Derivatives: The Dudley Synthesis of Coprinol

Chemexpress March 28, 2024 0 Comments

Hongjian Lu of Nanjing University used an Ir catalyst to mediate the regioselective ortho amination of the benzamide 1, leading to the protected anthranilamide 2 (J. Org. 574007-66-2 structure Chem.…

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Enantioselective Synthesis of Alcohols and Amines: The Huang/Chen Synthesis of

Chemexpress March 28, 2024 0 Comments

α-Tocopherol Pinhong Chen and Guosheng Liu of the Shanghai Institute of Organic Chemistry developed a protocol for the enantioselective conversion of a terminal alkene 1 to the secondary benzoate 2…

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Stereoselective Construction of Carbocyclic Rings

Chemexpress March 28, 2024 0 Comments

Carbocyclic rings, unlike saturated heterocyclic rings, are not susceptible to the hepatic activation that is the basis of much drug toxicity. To pave the way for pharmaceutical discovery based on…

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Oxidation: The Hong/Gui Synthesis of Bufospirostenin A

Chemexpress March 28, 2024 0 Comments

Oleg V. Larionov of the University of Texas at San Antonio devised a protocol for the decarboxylative coupling of an acid 1 with an arenesulfinate 2 to give the sulfoxide…

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Metal-Mediated C-C Ring Construction: The Li Synthesis of Bufogargarizin A

Chemexpress March 28, 2024 0 Comments

Christopher Uyeda of Purdue University achieved high enantioselectivity in the cyclopropanation of myrcene (1) with 2,2-dichloropropane (2) to give 3 (J. Am. Chem. Soc. 2023, 145, 9441. DOI: 10.1021/jacs.3c01949). Qinglei…

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Enantioselective Synthesis of Alcohols and Amines: The Zhang/Tu Synthesis of Eupomatilone-6

Chemexpress March 28, 2024 0 Comments

Vicente Gotor-Fernández and Iván Lavandera of the Universidad de Oviedo optimized the enzymatic reduction of the chloroketone 1 to the chlorohydrin 2, then telescoped that to begin with the 1-chloroalkyne…

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Tained with Mayer’s hematoxylin, washed in fresh water, dehydrated, and

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L elements (56). The induction of distinct copper efflux systems in amoxicillinresistant

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Tta1.00 Lapillus SagittaFig. 2. Alter in larval cobia otoliths because of this

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S by on a regular basis passage. The shape and development of iPS cell

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