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188806-90-8

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188806-90-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 188806-90-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,8,8,0 and 6 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 188806-90:
(8*1)+(7*8)+(6*8)+(5*8)+(4*0)+(3*6)+(2*9)+(1*0)=188
188 % 10 = 8
So 188806-90-8 is a valid CAS Registry Number.

188806-90-8Relevant articles and documents

1,3-dipolar cycloaddition of C-(2-thiazolyl)nitrones to chiral acrylates. Synthesis of enantiopure α-amino-2-alkylthiazoles and 5-formylpyrrolidin-2-ones

Tejero, Tomas,Dondoni, Alessandro,Rojo, Isabel,Merchan, Francisco L.,Merino, Pedro

, p. 3301 - 3318 (2007/10/03)

The 1,3-dipolar cycloaddition of thiazolyl nitrones with chiral acrylates has been studied. The use of the Oppolzer's camphor sultam as chiral inductor provided isoxazolidines with excellent regio- and diastereoselectivities and goad asymmetric induction. The cycloadducts were converted into homochiral α-amino-2-alkylthiazoles and 5-(2-thiazolyl)-3-hydroxy-2-pyrrolidinones. The latter compounds were precursors of highly functionalized pyrrolidines by the aldehyde unmasking from the thiazole ring and subsequent reactions of the formyl group.

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