[EN] INTRAMOLECULAR CYCLIZATION FOR GENERAL SYNTHESIS OF BICYCLIC ALKYL BIOISOSTERE BORONATES [FR] CYCLISATION INTRAMOLÉCULAIRE POUR LA SYNTHÈSE GÉNÉRALE DE BORONATES D'ALKYLE BICYCLIQUES
Practical and Modular Construction of C(sp<sup>3</sup>)-Rich Alkyl Boron Compounds
作者:Yangyang Yang、Jet Tsien、Ayala Ben David、Jonathan M. E. Hughes、Rohan R. Merchant、Tian Qin
DOI:10.1021/jacs.0c11964
日期:2021.1.13
Alkyl boronic acids and esters play an important role in the synthesis of C(sp3)-rich medicines, agrochemicals, and material chemistry. This work describes a new type of transition-metal-free mediated transformation to enable the construction of C(sp3)-rich and sterically hindered alkyl boron reagents in a practical and modular manner. The broad generality and functional group tolerance of this method
Deprotonation of a trimethylsilylmethaneboronic ester
作者:Donald S. Matteson、Debesh Majumdar
DOI:10.1039/c39800000039
日期:——
Deprotonation of pinacol trimethylsilylmethaneboronate yields an anion which reacts with carbonyl compounds to form alkeneboronic esters, or with alkyl halides to form α-trimethylsilylalkaneboronic esters.
Ruthenium-Catalyzed Carbon−Carbon Bond Formation via the Cleavage of an Unreactive Aryl Carbon−Nitrogen Bond in Aniline Derivatives with Organoboronates
作者:Satoshi Ueno、Naoto Chatani、Fumitoshi Kakiuchi
DOI:10.1021/ja0713431
日期:2007.5.1
refluxing toluene gave the corresponding phenylation product in 83% yield via aryl carbon−nitrogen bondcleavage. This reaction involves two notable features: (1) the coupling proceeds via the oxidative addition of an aryl carbon−nitrogen bond in anilines to the ruthenium complex, and (2) C−C bondformation takes place via transmetalation between the Ru−NR2 species and organoboronates.
Total Synthesis of (+)-Asperolide C by Iridium-Catalyzed Enantioselective Polyene Cyclization
作者:Oliver F. Jeker、Alberto G. Kravina、Erick M. Carreira
DOI:10.1002/anie.201307187
日期:2013.11.11
Domino rings: A general synthetic entry into labdane‐type diterpenoids has been developed based on an iridium‐catalyzed enantioselective polyenecyclization cascade. The potential of this process is demonstrated in the first total synthesis of the tetranorlabdane diterpene asperolide C (PMB=p‐methoxybenzyl, TMS= trimethylsilyl).
Palladium-catalyzed stereospecific epoxide-opening reaction of γ,δ-epoxy-α,β-unsaturated esters with an alkylboronic acid leading to γ,δ-vicinal diols with double inversion of the configuration
A palladium-catalyzed stereospecific epoxide-opening reaction of gamma,delta-epoxy-alpha,beta-unsaturated esters with an alkylboronic acid leading to gamma,delta-vicinal diols is described, which proceeds with retention of the configuration, i.e., via two consecutive S(N)2 processes, to afford the corresponding gamma,delta-cyclic boronates in high yields.