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169057-29-8

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169057-29-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 169057-29-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,9,0,5 and 7 respectively; the second part has 2 digits, 2 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 169057-29:
(8*1)+(7*6)+(6*9)+(5*0)+(4*5)+(3*7)+(2*2)+(1*9)=158
158 % 10 = 8
So 169057-29-8 is a valid CAS Registry Number.

169057-29-8Relevant articles and documents

An efficient route to α,β-epoxy ketones of high enantiomerical purity

Pegorier,Petit,Mambu,Larcheveque

, p. 1403 - 1405 (1994)

Acylepoxides were obtained in high enantiomeric purity (ee = 92-99%) by addition of organolithium or Grignard reagents to enantiomerically pure methyl or ethyl 2,3-epoxypropanoates at low temperature (-85°C).

Total syntheses of kurasoins A and B, novel protein farnesyltransferase inhibitors, and absolute structures of kurasoins A and B

Hirose, Tomoyasu,Sunazuka, Toshiaki,Zhi-Ming, Tian,Handa, Masaki,Uchida, Ryuji,Shiomi, Kazuro,Harigaya, Yoshihiro,Omura, Satoshi

, p. 777 - 784 (2007/10/03)

Asymmetric total syntheses of kurasoins A (1) and B (2), recently discovered protein farnesyltransferase (PFTase) inhibitors, have been achieved in seven steps from 2-(4-hydroxyphenyl)ethanol via the stereospecific alkylation of the chiral epoxide ((-)-7) and in four steps from phenylacetaldehyde via the coupling reaction of the chiral epoxide ((-)- 13) with indole, respectively. The synthesis defined the (3S) absolute configuration of 1 and 2. The stereochemistry of the hydroxy group is important for eliciting PFTase inhibition.

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