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109493-07-4

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109493-07-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 109493-07-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,4,9 and 3 respectively; the second part has 2 digits, 0 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 109493-07:
(8*1)+(7*0)+(6*9)+(5*4)+(4*9)+(3*3)+(2*0)+(1*7)=134
134 % 10 = 4
So 109493-07-4 is a valid CAS Registry Number.

109493-07-4Relevant articles and documents

Studies on the Synthesis of Aphidicolin. Preparation of Aromatic Precursors for Spirocyclic Dienone Formation

Bell, Vivien L.,Giddings, Peter J.,Holmes, Andrew B.,Mock, Graham A.,Raphael, Ralph A.

, p. 1515 - 1522 (2007/10/02)

Novel syntheses of the alkanediones (12; R=Me, or CH2Ph) and the corresponding epoxides (13) are described.Attempts to cyclise these compounds to the spirocyclic dienone (4) were unsuccessful.Model studies on the phenolic keto cyano toluene-p-sulphonate (24) showed that the cyclopropane(25) was formed preferentially.A variety of related model compounds (29), (31), (32), and (37) were prepared and studied, but none could be cyclised to spirocyclic dienones.

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