The Palladium–Catalyzed Cross-Coupling Reaction of Enol Acetates of α-Bromo Ketones with 1-Alkenyl-, Aryl-, or Alkylboron Compounds; A Facile Synthesis of Ketones and Their Enol Acetates
作者:Shigeru Abe、Norio Miyaura、Akira Suzuki
DOI:10.1246/bcsj.65.2863
日期:1992.10
The synthesis of stereodefined enol acetates of ketones is readily accomplished by palladium–catalyzed cross-coupling reaction between alkyl-, aryl-, or 1-alkylboron reagents with enol acetates of α-bromo ketones. Hydroboration of alkene with 9-BBN, followed by coupling with (Z)-2-ethoxy-1-bromoethene gives the enol ether of aldehyde. These enol acetates and ethers are readily deprotected to give corresponding
Palladium‐Catalyzed Regiodivergent Synthesis of 1,3‐Dienyl and Allyl Esters from Propargyl Esters
作者:Mengfu Dai、Zhimin Sun、Liang‐An Chen
DOI:10.1002/anie.202203835
日期:2022.6.7
An unprecedented catalyst-controlled regiodivergent strategy has been developed that allows efficient access to structurally diverse 1,3-dienyl and allyl esters from common propargyl esters with high regio- and stereochemical outcomes. The ligand backbone is crucial for the regioselectivity pattern, enabling the palladium catalyst to involve electrophilic metal catalysis or sequential oxidative addition–reductive