cas 444120-95-0, 2-FLUORO-5-(4 4 5 5-TETRAMETHYL-(1 3 2)&

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Fluorine-controlled C-H borylation of arenes catalyzed by a PSiN-pincer platinum complex
An efficient, regioselective synthesis of fluorine-substituted arylboronic esters was achieved through fluorine-controlled C-H borylation of arenes with diboron catalyzed by a PSiN-platinum complex. The promising utility of the PSiN-platinum catalyst and its unique regioselectivity were demonstrated for the first time, which would complement the well-developed Ir-catalyzed C-H borylation.
Takaya, Jun,Ito, Shisei,Nomoto, Hironori,Saito, Narumasa,Kirai, Naohiro,Iwasawa, Nobuharu
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p. 17662 - 17665
(2015/12/18)

Iridium-catalyzed C-H borylation of pyridines
The iridium-catalysed C-H borylation is a valuable and attractive method for the preparation of aryl and heteroaryl boronates. However, application of this methodology for the preparation of pyridyl and related azinyl boronates can be challenged by low reactivity and propensity for rapid protodeborylation, particularly for a boronate ester ortho to the azinyl nitrogen. Competition experiments have revealed that the low reactivity is due to inhibition of the active catalyst through coordination of the azinyl nitrogen lone pair at the vacant site on the iridium. This effect can be overcome through the incorporation of a substituent at C-2. Moreover, when this is sufficiently electron-withdrawing protodeborylation is sufficiently slowed to permit isolation and purification of the C-6 boronate ester. Following functionalization, reduction of the directing C-2 substituent provides the product arising from formal ortho borylation of an unhindered pyridine ring. This journal is the Partner Organisations 2014.
Sadler, Scott A.,Tajuddin, Hazmi,Mkhalid, Ibraheem A. I.,Batsanov, Andrei S.,Albesa-Jove, David,Cheung, Man Sing,Maxwell, Aoife C.,Shukla, Lena,Roberts, Bryan,Blakemore, David C.,Lin, Zhenyang,Marder, Todd B.,Steel, Patrick G.
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p. 7318 - 7327
(2014/11/07)

Chemical Properties

Melting Point: 29-33oC(lit.)
Boiling Point: 304.208oC at 760 mmHg
Flash Point:>230 °F
Density: 1.1g/cm3
Storage Temp.:under inert gas (nitrogen or Argon) at 2-8°C
Vapor Pressure: 0.002mmHg at 25°C
PKA: -0.44±0.12(Predicted)
PSA: 31.35000
LogP: 1.51990

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Chemical Properties

Melting Point: 29-33oC(lit.)

Boiling Point: 304.208oC at 760 mmHg

Flash Point:>230 °F

Density: 1.1g/cm3

Storage Temp.:under inert gas (nitrogen or Argon) at 2-8°C

Vapor Pressure: 0.002mmHg at 25°C

PKA: -0.44±0.12(Predicted)

PSA: 31.35000

LogP: 1.51990

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