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1423117-90-1

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1423117-90-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1423117-90-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,4,2,3,1,1 and 7 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1423117-90:
(9*1)+(8*4)+(7*2)+(6*3)+(5*1)+(4*1)+(3*7)+(2*9)+(1*0)=121
121 % 10 = 1
So 1423117-90-1 is a valid CAS Registry Number.

1423117-90-1Relevant articles and documents

Stereoselective total synthesis of tubulysin v

Wang, Rui,Tian, Ping,Lin, Guoqiang

, p. 40 - 48 (2013/08/24)

The total synthesis of tubulysin V was accomplished in 1.0% overall yield with linear 13 steps. Our synthetic strategy featured the following two reactions. One is zinc-mediated aza-Barbier reaction of (R)-N-tert- butanesulfinyl imine 8 with β-ester group functionalized allylic bromide 9 to afford the chiral homo-allylic amine (7); the other is to employ the methodology of aqueous indium-mediated aza-Barbier reaction previously developed by our group, giving the chiral homo-allylic amine 13 with high efficiency. The total synthesis of tubulysin V was accomplished in 1.0% overall yield with linear 13 steps. Our synthetic strategy featured the following two reactions. One is zinc-mediated aza-Barbier reaction of (R)-N-tert-butanesulfinyl imine 8 with β-ester group functionalized allylic bromide 9 to afford the chiral homo-allylic amine 7; the other is to employ the methodology of aqueous indium-mediated aza-Barbier reaction previously developed by our group, giving the chiral homo-allylic amine 13 with high efficiency. Copyright

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