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83845-45-8

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83845-45-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 83845-45-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,3,8,4 and 5 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 83845-45:
(7*8)+(6*3)+(5*8)+(4*4)+(3*5)+(2*4)+(1*5)=158
158 % 10 = 8
So 83845-45-8 is a valid CAS Registry Number.

83845-45-8Relevant articles and documents

Diastereoselective C?H Bond Amination for Disubstituted Pyrrolidines

Iovan, Diana A.,Wilding, Matthew J. T.,Baek, Yunjung,Hennessy, Elisabeth T.,Betley, Theodore A.

, p. 15599 - 15602 (2017/11/16)

We report herein the improved diastereoselective synthesis of 2,5-disubstituted pyrrolidines from aliphatic azides. Experimental and theoretical studies of the C?H amination reaction mediated by the iron dipyrrinato complex (AdL)FeCl(OEt2) provided a model for diastereoinduction and allowed for systematic variation of the catalyst to enhance selectivity. Among the iron alkoxide and aryloxide catalysts evaluated, the iron phenoxide complex exhibited superior performance towards the generation of syn 2,5-disubstituted pyrrolidines with high diastereoselectivity.

Investigating the arenyl-diene double [3 + 2] photocycloaddition reaction

Penkett, Clive S.,Woolford, Jason A.,Read, Timothy W.,Kahan, Rachel J.

supporting information; experimental part, p. 1295 - 1304 (2011/04/26)

The double [3 + 2] photocycloaddition reaction involving arenyl-dienes has been used to assemble seven separate [5.5.5.5] fenestrane structures that include ether and aza variants. The primary photolysis step was a meta photocycloaddition reaction, while

Photochemistry of (o-Methylphenyl)alkadienes: Attempted Intramolecular Trapping of the Resulting o-Xylylenes

Hornback, Joseph M.,Barrows, Russell D.

, p. 90 - 98 (2007/10/02)

The photochemistry of a series of o-methylphenyl dienes was investigated in order to determine if the resulting o-xylylenes could be trapped in an intramolecular Diels Alder reaction in synthetically useful yields.Irradiation of 3 gave meta-isomer 4 as the major product along with lower yields of double bond migration product 5 and the desired cycloadduct 6.The best yield of 6 (24percent) was obtained by irradiation of 3 with a low-pressure mercury vapor lamp at low temperatures.The other compounds investigated gave none of the intramolecular Diels-Alder product of the o-xylylene.Irradiation of 17 gave only double bond migration product 18.Irradiation of 22 gave an excellent yield of (2+2) cycloadduct 23.Irradiation of 26 gave meta-isomer 28, double bond migration product 27, and 29, a (2+2) cycloadduct of 28.

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