高效动力学拆分 (KR) 发生在外消旋 3-aryl-1-indanones 的不对称转移氢化 (ATH) 反应中,使用商业 ( R , R )-或 ( S , S )-Ts-DENEB 作为催化剂,a 1:5 HCO 2 H和Et 3 N的混合物作为氢源和MeOH作为溶剂。这个过程在室温下产生几乎相等的顺式-3-芳基二氢萘并具有高 dr 和 ee 的产率,以及具有优异 ee 的未反应的 3-芳基二氢萘酮。使用 ATH-KR 方案生成的 3-芳基茚满醇和 3-芳基茚满酮的立体选择性转化形成 (+)-吲达曲林并具有合成价值 ( R)-6-甲基-4-苯基香豆素,是制备( R )-托特罗定、( S )-4-aryl-3,4-dihydroquinoline-2( 1H )-one和( S )的关键中间体-4-aryl-3,4-dihydroisoquinoline-1(2 H )-one。
Palladium Nanoparticles‐Catalyzed Synthesis of Indanone Derivatives via Intramolecular Reductive Heck Reaction
作者:Naziya Parveen、Govindasamy Sekar
DOI:10.1002/adsc.201900752
日期:2019.10.8
An efficient protocol for the straightforward, single‐step synthesis of 3‐aryl‐1‐indanones from 2′‐iodochalcone via reductive Heckreaction using phosphine free, stable and reusable binaphthyl stabilized palladium nanoparticle (Pd‐BNP) as a catalyst has been described. An immense array of substrate scope with electron‐rich and deficient 2′‐iodochalcones have been synthesized. Further derivatization
Palladium-Catalyzed Asymmetric Reductive Heck Reaction of Aryl Halides
作者:Guizhou Yue、Kaining Lei、Hajime Hirao、Jianrong Steve Zhou
DOI:10.1002/anie.201501712
日期:2015.5.26
Asymmetric reductive Heck reaction of arylhalides is realized in high stereoselectivity. Hydrogen‐bond donors, trialkylammonium salts in a glycol solvent, were used to promote halide dissociation from neutral arylpalladium complexes to access cationic, stereoselective pathways.