Lewis Acid‐Catalyzed Diastereoselective C−C Bond Insertion of Diazo Esters into Secondary Benzylic Halides for the Synthesis of α,β‐Diaryl‐β‐haloesters
作者:Fei Wang、Yoshihiro Nishimoto、Makoto Yasuda
DOI:10.1002/anie.202204462
日期:2022.7.18
Lewis acid-catalyzed carbon–carbon bond insertion of α-diazo esters into secondary benzylic halides is reported. Herein, the carbon chain elongation of acyclic benzylic halides and ring expansion in cyclic versions were realized to afford α,β-diaryl-β-halo carbonyl compounds with excellent diastereoselectivity. Computational study charted a specific mechanism involving the Lewis acid-promoted cleavage/re-formation
The Effect of Substitution on the Solvolysis Rates of Benzhydryl Chlorides<sup>1</sup>
作者:Siegfried Altscher、Richard Baltzly、Samuel W. Blackman
DOI:10.1021/ja01134a054
日期:1952.7
Propargylic and Allenic Carbocycle Synthesis through Palladium-Catalyzed Dearomatization Reaction
作者:Bo Peng、Xiujuan Feng、Xin Zhang、Sheng Zhang、Ming Bao
DOI:10.1021/jo100211d
日期:2010.4.16
The dearomatization reaction of benzylic chlorides (1a-k), chloromethylnaphthalenes (1l-r), and naphthalene allyl chlorides (3a-d) with allenyltributyltin proceeded smoothly in the presence of Pd(PPh(3))(4) catalyst at room temperature to give the corresponding propargylated and/or allenylated dearomatization products (5, 5'; 6, 6'; and 7, respectively) in high to fair yields. The reaction of 1a-k proceeded smoothly in the presence of TBAF, whereas it was not necessary to use TBAF as an additive in the reactions of 1l-k and 3a-d. These reactions provided a new and efficient method for the synthesis of propargylic and allenic carbocycles.