I found the field of Chemistry very interesting. Saw the article Syngas-Free Highly Regioselective Rhodium-Catalyzed Transfer Hydroformylation of Alkynes to alpha,beta-Unsaturated Aldehydes published in 2019.0. Application In Synthesis of 4-Nitrobenzoic acid, Reprint Addresses You, JS (corresponding author), Sichuan Univ, Coll Chem, Minist Educ, Key Lab Green Chem & Technol, 29 Wangjiang Rd, Chengdu 610064, Sichuan, Peoples R China.. The CAS is 62-23-7. Through research, I have a further understanding and discovery of 4-Nitrobenzoic acid
The hydroformylation of alkynes is a fundamental and important reaction in both academic research and industry. Conventional methods focus on the conversion of alkynes, CO, and H-2 into alpha,beta -unsaturated aldehydes, but they often suffer from problems associated with operation, regioselectivity, and chemoselectivity. Herein, we disclose an operationally simple, mild, and syngas-free rhodium-catalyzed reaction for the hydroformylation of alkynes via formyl and hydride transfer from an alkyl aldehyde. This synthetic method uses inexpensive and easy-to-handle n-butyraldehyde to overcome the challenge posed by the use of syngas in traditional approaches and employs a commercially available catalyst and ligand to transform a broad range of internal alkynes, especially alkynyl-containing complex molecules, into versatile stereodefined alpha,beta -unsaturated aldehydes with excellent chemo-, regio-, and stereoselectivity.
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Reference:
Phthalazine – Wikipedia,
,Phthalazine | C8H6N2 – PubChem