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1280738-14-8

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1280738-14-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1280738-14-8 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,8,0,7,3 and 8 respectively; the second part has 2 digits, 1 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 1280738-14:
(9*1)+(8*2)+(7*8)+(6*0)+(5*7)+(4*3)+(3*8)+(2*1)+(1*4)=158
158 % 10 = 8
So 1280738-14-8 is a valid CAS Registry Number.

1280738-14-8Relevant articles and documents

Synthesis of α-Difluoromethyl Aryl Ketones through a Photoredox Difluoromethylation of Enol Silanes

Arseniyadis, Stellios,Cambeiro, Xacobe C.,Selmi-Higashi, Elias,Zhang, Jinlei

supporting information, p. 4239 - 4243 (2021/06/28)

We report here an efficient and highly straightforward access to α-difluoromethylated ketones through a visible light-mediated difluoromethylation of readily available enol silanes. The method, which takes advantage of the polyvalence of Hu's reagent, N-tosyl-S-difluoromethyl-S-phenylsulfoximine, used here as a CHF2 radical precursor under catalytic photoredox conditions, is practical, scalable, and provides the corresponding α-CHF2 ketones in good to excellent yields.

Chemo- and Regioselective Ring Construction Driven by Visible-Light Photoredox Catalysis: an Access to Fluoroalkylated Oxazolidines Featuring an All-Substituted Carbon Stereocenter

Chu, Xue-Qiang,Ge, Danhua,Wang, Mao-Lin,Rao, Weidong,Loh, Teck-Peng,Shen, Zhi-Liang

supporting information, p. 4082 - 4090 (2019/08/01)

The unique advantages conferred by incorporation of all-substituted carbon stereocenters in organic molecules have gained widespread recognition. In this work, we describe a three-component cyclization to access C-2 fluoroalkylated oxazolidines by fragments assembly of readily available silyl enol ether, fluoroalkyl halide, and chiral amino alcohol in a single reaction vessel, which provides an efficient strategy for expanding the pool of pharmaceutically important heterocycles featuring an all-substituted carbon stereocenter. This process proceeds efficiently in a chemo-, regio-, and stereoselective fashion under mild reaction conditions at room temperature and exhibits broad functional group tolerance. The successful realization of this controlled heteroannulation sequence relies on distinctive perfluoroalkylation, regio- and stereoselective radical cyclization through visible-light photoredox catalysis. Moreover, a one-pot procedure directly employing ketone as substrate has also been achieved. (Figure presented.).

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