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175416-56-5

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175416-56-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 175416-56-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,5,4,1 and 6 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 175416-56:
(8*1)+(7*7)+(6*5)+(5*4)+(4*1)+(3*6)+(2*5)+(1*6)=145
145 % 10 = 5
So 175416-56-5 is a valid CAS Registry Number.

175416-56-5Downstream Products

175416-56-5Relevant articles and documents

Oxidative rearrangement of 2-substituted oxazolines. A novel entry to 5,6-dihydro-2H-1,4-oxazin-2-ones and morpholin-2-ones

Shafer,Molinski

, p. 2044 - 2050 (2007/10/03)

A novel synthesis of 5,6-dihydro-2H-1,4-oxazin-2-ones by SeO2-promoted oxidative rearrangement of 2-alkyl- and 2-(arylmethyl)oxazolines is described. Yields are good to excellent (up to 94%) with the highest yields obtained for 2-arylmethyl- and 2-neopentyl-substituted oxazolines. This reaction provides convenient access to novel 5-aryl-substituted dihydrooxazinones in high yield. The latter compounds are important 'chiral glycine' synthons for asymmetric synthesis of α-amino acids. Since oxazolines are readily derived from carboxylic acids or their equivalents, this oxidative rearrangement constitutes an entry to synthesis of α-amino acids from carboxylic acids. A mechanism is proposed to account for the rearrangement involving a 'nitrilium to acylium' 1,2-migration.

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