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280758-01-2

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280758-01-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 280758-01-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,8,0,7,5 and 8 respectively; the second part has 2 digits, 0 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 280758-01:
(8*2)+(7*8)+(6*0)+(5*7)+(4*5)+(3*8)+(2*0)+(1*1)=152
152 % 10 = 2
So 280758-01-2 is a valid CAS Registry Number.

280758-01-2Relevant 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

Synthesis of homochiral N-Boc-β-aminoaldehydes from N-Boc-β-aminonitriles

Toujas, Jean-Louis,Jost, Eric,Vaultier, Michel

, p. 713 - 718 (2007/10/03)

Enantiopure N-Boc-β-aminoaldehydes are efficiently prepared in good yields from N-Boc-β-aminonitriles by reduction of the nitrile function with diisobutylaluminium hydride (DIBAL-H) - Keywords: β-aminoaldehyde; β-aminonitrile; α-aminoacid; homochiral; enantiomeric excess; reduction; DIBAL-H

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