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4-cholesten-3-one (1R,2R)-1,2-bis(2-nitrophenyl)ethane-1,2-diol ketal is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

499982-87-5

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499982-87-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 499982-87-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,9,9,9,8 and 2 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 499982-87:
(8*4)+(7*9)+(6*9)+(5*9)+(4*8)+(3*2)+(2*8)+(1*7)=255
255 % 10 = 5
So 499982-87-5 is a valid CAS Registry Number.

499982-87-5Downstream Products

499982-87-5Relevant academic research and scientific papers

Bis(o-nitrophenyl)ethanediol: A practical photolabile protecting group for ketones and aldehydes

Blanc, Aurelien,Bochet, Christian G.

, p. 1138 - 1141 (2007/10/03)

The ketals of bis(o-nitrophenyl)ethanediol and ketones or aldehydes are smoothly deprotected in neutral conditions by irradiation with 350 nm light. The chemical stability in basic, acidic, and oxidizing media makes this form of protection orthogonal to classical protecting groups. Both racemic and enantiopure forms are readily available in two steps from inexpensive starting materials.

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