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941676-44-4

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941676-44-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 941676-44-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,4,1,6,7 and 6 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 941676-44:
(8*9)+(7*4)+(6*1)+(5*6)+(4*7)+(3*6)+(2*4)+(1*4)=194
194 % 10 = 4
So 941676-44-4 is a valid CAS Registry Number.

941676-44-4Relevant articles and documents

Total synthesis of (-)-stemoamide

Torssell, Staffan,Wanngren, Emil,Somfai, Peter

, p. 4246 - 4249 (2008/02/04)

(Chemical Equation Presented) A stereocontrolled total synthesis of (-)-stemoamide (1) is presented. The synthesis starts from commercially available (S)-pyroglutaminol (4). A chemoselective iodoboration of 5 was used to access key intermediate 3. The β,γ-unsaturated azepine derivative 2 was obtained via a Pd(0)-catalyzed sp2-sp3 Negishi cross-coupling using a Reformatsky nucleophile followed by a ring-closing metathesis reaction. The required C8-C9 trans-stereochemistry of 1 was accessed through a stereoselective bromolactonization/1,4-reduction sequence.

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