312693-17-7Relevant academic research and scientific papers
Asymmetric Synthesis of Fluorinated Allenes by Rhodium-Catalyzed Enantioselective Alkylation/Defluorination of Propargyl Difluorides with Alkylzincs
Hayashi, Tamio,Ng, Jia Sheng
supporting information, p. 20771 - 20775 (2021/08/25)
The reaction of propargyl difluorides R1CF2C≡CR2 with alkylzincs R3ZnCl giving axially chiral fluorinated allenes R1FC=C=CR2R3 with high enantioselectivity (up to 99 % ee) was found to be catalyzed by a chiral diene/rhodium complex. A key step in the catalytic cycle is selective elimination of one of the enantiotopic fluorides at the β-position of an alkenyl-Rh intermediate, which is generated by regioselective addition of R3-Rh onto the triple bond of the starting difluorides.
Stereoselective Cobalt-Catalyzed Cross-Coupling Reactions of Arylzinc Chlorides with α-Bromolactones and Related Derivatives
Hofmayer, Maximilian S.,Sunagatullina, Alisa,Br?samlen, Daniel,Mauker, Philipp,Knochel, Paul
supporting information, p. 1286 - 1289 (2020/02/13)
α-Bromolactones bearing a substituent in the β-position undergo a highly trans-diastereoselective arylation with arylzinc chlorides in the presence of 10-20% CoCl2 and 10-20% PPh3 in THF under mild conditions (25 °C, 16 h) leading to
Continuous preparation method of benzyl zinc halide and derivatives of benzyl zinc halide
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Paragraph 0087-0089, (2019/12/25)
The invention provides a continuous preparation method of benzyl zinc halide and derivatives of the benzyl zinc halide. According to the continuous preparation method, a continuous reactor is adoptedfor the reaction that zinc atoms are directly insert int
A practical cobalt-catalyzed cross-coupling of benzylic zinc reagents with aryl and heteroaryl bromides or chlorides
Benischke, Andreas D.,Knoll, Irina,Rérat, Alice,Gosmini, Corinne,Knochel, Paul
supporting information, p. 3171 - 3174 (2016/02/20)
A catalytic system consisting of 5 mol% CoCl2 and 10 mol% isoquinoline allows a convenient cross-coupling of benzylic zinc reagents with various aryl and heteroaryl bromides or chlorides leading to polyfunctionalized diaryl- and aryl-heteroaryl-methane derivatives.
