Potassium haloalkyltrifluoroborate salts: synthesis, application, and reversible ligand replacement with MIDA
作者:Sarah J. Burke、James M. Gamrat、Jacqueline R. Santhouse、Dylan T. Tomares、John W. Tomsho
DOI:10.1016/j.tetlet.2015.08.012
日期:2015.10
of potassium haloalkyltrifluoroborate salts, important building blocks for the incorporation of boron into complex molecules. The sequential, high-yielding procedures (65% to 92%) involve hydroboration of commercially available haloalkenes with dichloroborane (prepared in situ from triethylsilane and boron trichloride), followed by treatment of the crude hydroboration products with potassium hydrogen
and the pinacolboronates can be isolated after reaction of the benzylboronic acid with pinacol. The metholodogy has been applied to the reactions of alkylboronic acids with N-tosylhydrazones of aromaticaldehydes and ketones, and to the reactions of arylboronic acids with N-tosylhydrazones of aliphatic ketones. Moreover, the employment of the DBU/DIPEA bases combination allows for homogeneous reactions
[EN] NOVEL COMPOSITIONS AND METHODS OF USE<br/>[FR] NOUVELLES COMPOSITIONS ET PROCÉDÉS D'UTILISATION
申请人:ARDEA BIOSCIENCES INC
公开号:WO2009089263A3
公开(公告)日:2009-09-17
Potassium 5-Bromopentyltrifluoroborate
作者:Sarah J. Burke
DOI:10.15227/orgsyn.100.0218
日期:——
Virtues of Volatility: A Facile Transesterification Approach to Boronic Acids
作者:Stefan P. A. Hinkes、Christian D. P. Klein
DOI:10.1021/acs.orglett.9b00584
日期:2019.5.3
Boronic acids are an increasingly important compound class for many applications, including C–C bond formation reactions, medicinal chemistry, and diagnostics. The deprotection of boronic ester intermediates is frequently a problematic and inefficient step in boronic acid syntheses. We describe an approach that highly facilitates this transformation by leveraging the volatility of methylboronic acid and