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2,5-bis-(thiophen-2-yl)-1,3,4-selenadiazole is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

70250-34-9

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70250-34-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 70250-34-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,0,2,5 and 0 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 70250-34:
(7*7)+(6*0)+(5*2)+(4*5)+(3*0)+(2*3)+(1*4)=89
89 % 10 = 9
So 70250-34-9 is a valid CAS Registry Number.

70250-34-9Downstream Products

70250-34-9Relevant academic research and scientific papers

Symmetrical spiro-phosphoroheterocycles from the selenation of carbohydrazides

Hua, Guoxiong,Cordes, David B.,Li, Yang,Slawin, Alexandra M.Z.,Derek Woollins

, p. 3311 - 3314 (2011)

2,4-Bis(phenyl)-1,3-diselenadiphosphetane-2,4-diselenide (Woollins' reagent) reacts with benzoic hydrazides in refluxing toluene to give new symmetrical spiro heterocycles in 48-76% isolated yields. However, under identical conditions, treating Woollins' reagent with thiophene-2-carbohydrazide leads to an additional product, 1,3,4-selenadiazole (27% yield) together with the spiro phosphorus heterocycle in 44% yield. Three representative X-ray structures are reported.

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