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40188-25-8

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40188-25-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 40188-25-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,0,1,8 and 8 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 40188-25:
(7*4)+(6*0)+(5*1)+(4*8)+(3*8)+(2*2)+(1*5)=98
98 % 10 = 8
So 40188-25-8 is a valid CAS Registry Number.

40188-25-8Relevant articles and documents

Photochemical approach to the synthesis of naturally occurring thienylacetylenes

D'Auria, Maurizio,Tofani, Daniela

, p. 9315 - 9322 (1992)

Three naturally occurring thienylacetylenes are synthesized through a photochemical coupling of 5-iodo-2-thienyl derivatives and 5-trimethylsilyl-2-thienylacetylene.

Tandem photoarylation-photoisomerization of halothiazoles: Synthesis, photophysical and singlet oxygen activation properties of ethyl 2-arylthiazole-5-carboxylates

Amati, Mario,Belviso, Sandra,D'Auria, Maurizio,Lelj, Francesco,Racioppi, Rocco,Viggiani, Licia

experimental part, p. 3416 - 3427 (2010/08/20)

The photochemical reaction between ethyl 2-chlorothiazole5-carboxylate and benzene gave no product. In contrast, the reaction with ethyl 2-iodothiazole-5-carboxylate gave ethyl 3-phenylisothiazole-4-carboxylate. The same behaviour was observed if the reac

SYNTHESIS AND PHOTOCHEMICAL PROPERTIES OF NITROTHIENYL DERIVATIVES

D'Auria, Maurizio,Mauriello, Giacomo

, p. 542 - 545 (2007/10/02)

Some 2-nitrothienyl derivatives characterized by the presence of an aryl or heteroaryl substituent in the C-5 position were synthesized by using a photochemical coupling procedure.All synthesized compounds were demonstrated to be singlet oxygen sensitizers in the trans-α,α'-dimethylstilbene photooxidation.

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