A multicomponent approach for the preparation of homoallylic alcohols
作者:Jian-Siang Poh、Shing-Hing Lau、Iain G. Dykes、Duc N. Tran、Claudio Battilocchio、Steven V. Ley
DOI:10.1039/c6sc02581a
日期:——
Here we report the in situ generation of transient allylic boronic species, by reacting TMSCHN2 and E-vinyl boronic acids, followed by their subsequent trapping with aldehydes as electrophiles to yield...
Synthesis of Trisubstituted Alkenyl Boronic Esters from Alkenes Using the Boryl-Heck Reaction
作者:William B. Reid、Donald A. Watson
DOI:10.1021/acs.orglett.8b02949
日期:2018.11.2
The direct borylation of disubstituted alkenes is reported. These conditions allow for the conversion of a variety 1,1- and 1,2-disubstituted alkenes to trisubstituted alkenyl boronic esters with outstanding yields and excellent E/Z selectivities. The utility of this reaction has been demonstrated with several downstream functionalization reactions, which allow access to diverse, stereodefined, functionalized
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
Gold-Catalyzed Oxidative Cyclization of 1,5-Enynes Using External Oxidants
作者:Dhananjayan Vasu、Hsiao-Hua Hung、Sabyasachi Bhunia、Sagar Ashok Gawade、Arindam Das、Rai-Shung Liu
DOI:10.1002/anie.201102581
日期:2011.7.18
Golden circle: Two gold‐catalyzed oxidativecyclizations of 1,5‐enynes using 8‐methylquinoline N‐oxide are presented (see example). Experimental results indicate that both reactions proceed through prior oxidation of alkyne to form α‐carbonyl intermediates and subsequent intramolecular carbocyclization.
A novel and efficient route to (E)-alk-1-enyl boronic acid derivatives from (E)-1-(trimethylsilyl)alk-1-enes and a formal Suzuki–Miyaura cross-coupling reaction starting with vinylsilanes
作者:Gianluca M. Farinola、Vito Fiandanese、Luigia Mazzone、Francesco Naso
DOI:10.1039/c39950002523
日期:——
A novel and highly efficient conversion of vinylsilanes into vinyl boronates is described together with their SuzukiâMiyaura cross-coupling reaction, performed without isolating the intermediate resulting from borodesllyiation.