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54049-12-6

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54049-12-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 54049-12-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,4,0,4 and 9 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 54049-12:
(7*5)+(6*4)+(5*0)+(4*4)+(3*9)+(2*1)+(1*2)=106
106 % 10 = 6
So 54049-12-6 is a valid CAS Registry Number.

54049-12-6Downstream Products

54049-12-6Relevant articles and documents

An efficient synthesis of trisubstituted oxazoles via chemoselective O-acylations and intramolecular Wittig reactions

Tsai, Yi-Ling,Fan, Yu-Shiou,Lee, Chia-Jui,Huang, Chan-Hui,Das, Utpal,Lin, Wenwei

supporting information, p. 10266 - 10268 (2013/10/22)

Preparation of new types of trisubstituted oxazoles is realized via chemoselective O-acylations and intramolecular Wittig reactions with ester functionalities using in situ formed phosphorus ylides as key intermediates. A plausible reaction mechanism for this undiscovered chemistry is also proposed based on the existence of expected and rearranged isomeric oxazoles.

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