Fidelibus, Pablo M.; Silbestri, Gustavo F.; Lockhart, Maria T.; Mandolesi, Sandra D.; Chopa, Alicia B.; Podesta, Julio C. published the artcile< Three-step synthesis of arylpolyboronic acids from phenols via organotin compounds>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is boronic acid arenediboronic benzenetriboronic preparation transmetalation stannane borane; stannylation borylation chlorophenol diphenol preparation arenediboronic acid; Suzuki coupling arenediboronic acid preparation substituted terphenyl.
Starting from phenols, arenediboronic and arenetriboronic acids were prepared in three-step procedure by transmetalation of the corresponding distannyl and tristannyl arenes by BH3/THF; Suzuki coupling of the prepared boronic acids gave polyarene compounds Reaction of chlorophenols or diphenols with di-Et chlorophosphate gave the corresponding mono- or bis-(diethoxyphosphoryl)-substituted arenes, which undergo stannylation by Me3SnNa in liquid ammonia under irradiation, affording arenedistannanes (Me3Sn)2X (5, X = 1,4-naphthalenediyl; 6, X = 2,7-naphthalenediyl; 7, X = 3,5-pyridinediyl, 8, X = 4,4′-isopropylidenebis[1,4-phenylene]) in 65-90% yield. Reaction of 5-8 with BH3/THF afforded the diboronic acids, [(HO)2B]2X (12-15, same X) in around 80% yield. In order to confirm their structure, some of the diboronic acids were converted into the corresponding pinacol esters. The results obtained in a study on the synthesis of various terphenyls through double and triple Suzuki couplings catalyzed by palladium acetate between the obtained arylpolyboronic acids and various aryl halides are also reported. These reactions proceeded with an average 65% yield, also enabling to confirm the structures of some of the diboronic acids. The structure of the new compounds was determined by 1H, 13C and 119Sn NMR spectroscopy, mass spectrometry and IR spectroscopy.
Applied Organometallic Chemistry published new progress about Aryl halides Role: RCT (Reactant), RACT (Reactant or Reagent). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics