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127535-98-2

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127535-98-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 127535-98-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,7,5,3 and 5 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 127535-98:
(8*1)+(7*2)+(6*7)+(5*5)+(4*3)+(3*5)+(2*9)+(1*8)=142
142 % 10 = 2
So 127535-98-2 is a valid CAS Registry Number.

127535-98-2Relevant articles and documents

Regio- and Diastereoselectivity in the Reaction Sequence from Secondary 3-Oxa-5-hexen-1-ylamines to Bicyclic Compounds via Nitrones

Aurich, Hans Günter,Geiger, Michael,Sievers, Ulrich

, p. 1004 - 1006 (2007/10/03)

Secondary amines 2 and 8 are oxidized by hydrogen peroxide in the presence of sodium tungstate providing nitrones. It the amino function is substituted by one primary and one secondary alkyl moiety, oxidation proceeds with high regioselectivity at the primary alkyl group affording aldonitrones. Thus, compound 2b gives exclusively 3b that undergoes an intramolecular cycloaddition yielding 4b. From 2c, however, in addition to 4c nitrone 5 is formed as by-product, which affords the bridged compound 6 on heating in toluene. Oxidation of compounds 8 yields nitrones 9 which are converted to bridged compounds 10 as major products along with small amounts of regioisomers 11 at elevated temperatures. The intramolecular cycloaddition of the chiral nitrones 3b and c as well as 9b proceeds with high diastereoselectivity.

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