The highly enantioselective copper-catalyzed three-component boroacylation of 1,1-disubstituted allenes is reported by using a class of chiral ligands (WJ-Phos), delivering various functionalized organoboron compounds bearing an all-carbon stereocenter in moderate to good yields with high enantioselectivities. WJ-Phos is a ferrocene-derived chiral sulfinamide phosphine ligand and can be easily synthesized
Nucleophilic Fluorination Catalyzed by a Cyclometallated Rhodium Complex
作者:Patrick J. Morgan、Graham C. Saunders、Stuart A. Macgregor、Andrew C. Marr、Peter Licence
DOI:10.1021/acs.organomet.2c00052
日期:2022.4.11
Quantitative catalytic nucleophilic fluorination of a range of acyl chlorides to acyl fluorides was promoted by a cyclometallated rhodium complex [(η5,κ2C-C5Me4CH2C6F5CH2NC3H2NMe)- RhCl] (1). 1 can be prepared in high yields from commercially available starting materials using a one-pot method. The catalyst could be separated, regenerated, and reused. Rapid quantitative fluorination generated the fluoride
环金属铑配合物 [(η 5 ,κ 2 CC 5 Me 4 CH 2 C 6 F 5 CH 2 NC 3 H 2 NMe)- RhCl] ( 1 )。 1可以使用一锅法由市售起始原料以高产率制备。催化剂可以分离、再生和重复使用。快速定量氟化生成活性药物成分丙磺舒的氟化物类似物。红外原位监测验证了基材到产品的清洁转化。 VTNA 图解动力学分析和 DFT 计算得出了涉及亲核 Rh-F 键的假定反应机制。
Photoinduced N-Heterocyclic Nitrenium-Catalyzed Single Electron Reduction of Acyl Fluorides for Phenanthridine Synthesis
作者:Lei Bao、Zhi-Xiang Wang、Xiang-Yu Chen
DOI:10.1021/acs.orglett.3c00049
日期:2023.1.27
Acylfluorides are versatile reagents in organic synthesis. However, there is no precedent to employ acylfluorides as acyl radical precursors. We herein report an N-heterocyclic nitrenium iodide salt-catalyzed photoreduction of acylfluorides to produce acyl radicals, which could react with 2-isocyanobiaryls to afford various carbonyl phenanthridines.