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105359-25-9

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105359-25-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 105359-25-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,5,3,5 and 9 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 105359-25:
(8*1)+(7*0)+(6*5)+(5*3)+(4*5)+(3*9)+(2*2)+(1*5)=109
109 % 10 = 9
So 105359-25-9 is a valid CAS Registry Number.

105359-25-9Relevant articles and documents

Total Synthesis of Natural (+)-Spatol. Confirmation of The Absolute Stereostructure

Tanaka, Masahide,Tomioka, Kiyoshi,Koga, Kenji

, p. 12843 - 12852 (2007/10/02)

Total synthesis of optically pure spatol (+)-1 was achieved by employing asymmetric (2+2) photocycloaddition of the optically pure 12 with cyclopentenone ethylene ketal.The two major photocycloadducts 14, 15 were separately converted into the cis,anti,cis-tricyclo2,6>decane 9 and then to the sulfonium 11.Coupling of 11 through ylide with optically active epoxyaldehyde 24 provided optically pure 1 with definite absolute configuration.

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