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1187560-42-4

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1187560-42-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1187560-42-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,8,7,5,6 and 0 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1187560-42:
(9*1)+(8*1)+(7*8)+(6*7)+(5*5)+(4*6)+(3*0)+(2*4)+(1*2)=174
174 % 10 = 4
So 1187560-42-4 is a valid CAS Registry Number.

1187560-42-4Relevant articles and documents

Polyol synthesis with β-Oxyanionic alkyllithium Reagents: Syntheses of aculeatins A, B, and D

Malathong, Viengkham,Rychnovsky, Scott D.

, p. 4220 - 4223 (2009)

Synthesis of ketone aldol products using a non-aldol route was developed. The β-phenylthio alcohols were prepared from optically pure oxiranes. Deprotonation and reductive lithiation generated the key intermediate, a β-oxyanionic alkyllithium reagent. Addition to a Weinreb amide produced the β-hydroxy ketone In >90% yield using only 1.5 equiv of the phenylthio alcohol. Stereoselective reduction of the ketone led to either the syn-or anti-1,3-diol. This simple, convergent sequence was used to prepare aculeatins A, B, and D from a common intermediate

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