Welcome to LookChem.com Sign In|Join Free

CAS

  • or

651737-69-8

Post Buying Request

651737-69-8 Suppliers

Recommended suppliersmore

  • Product
  • FOB Price
  • Min.Order
  • Supply Ability
  • Supplier
  • Contact Supplier

651737-69-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 651737-69-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,5,1,7,3 and 7 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 651737-69:
(8*6)+(7*5)+(6*1)+(5*7)+(4*3)+(3*7)+(2*6)+(1*9)=178
178 % 10 = 8
So 651737-69-8 is a valid CAS Registry Number.

651737-69-8Downstream Products

651737-69-8Relevant articles and documents

Synthesis of Chemically Stabilized Phosmidosine Analogues and the Structure-Activity Relationship of Phosmidosine

Sekine, Mitsuo,Okada, Kazuhisa,Seio, Kohji,Kakeya, Hideaki,Osada, Hiroyuki,Obata, Tohru,Sasaki, Takuma

, p. 314 - 326 (2007/10/03)

Phosmidosine is known to have potent antitumor activity and the unique property of stopping cell growth at the G1 phase in the cell cycle. However, this natural product having N-prolylphosphoramidate and O-methyl ester linkages on the 5′-phosphoryl residue is unstable under basic conditions and even during the chemical synthesis due to its inherent methyl transfer activity. To find stable derivatives of phosmidosine, a variety of phosmidosine analogues 1a-d replaced by longer alkyl groups in place of the methyl group on the phosphoramidate linkage were synthesized by reaction of alkyl N-(N-tritylprolyl)phosphorodiamidite derivatives 7a-d with an 8-oxoadenosine derivative 4 protected with acid-labile protecting groups. Consequently, the O-ethyl ester derivative lb was found to be sufficiently stable in aqueous solution. When the prolyl group was replaced by other aminoacyl moieties, the reaction of N-tritylaminoacylamide derivatives 25a-d with an appropriately protected 8-oxoadenosine 5′-(ethyl phosphoramidite) derivative 9 gave better results than the above coupling reaction. A phosphoramidothioate derivative 17 and several simple compounds such as 11, 13, and 15 lacking partial structures of phosmidosine were also synthesized. The antitumor activities of these modified analogues were extensively studied to clarify the structure-activity relationship of phosmidosine. As a result, the two diastereoisomers of longer alkyl-containing phosmidosine analogues both proved to have similar antitumor activities. Replacement of L-proline with other L-amino acids or D-proline resulted in considerable decrease of the antitumor activity. The non-nucleotidic materials 13 did not show any antitumor activity, but a simple core compound of 11 exhibited weak cytotoxicity. The phosphoramidothioate derivative 17 maintained essentially a similar antitumor activity, but the efficiency decreased slightly.

Post a RFQ

Enter 15 to 2000 letters.Word count: 0 letters

Attach files(File Format: Jpeg, Jpg, Gif, Png, PDF, PPT, Zip, Rar,Word or Excel Maximum File Size: 3MB)

1

What can I do for you?
Get Best Price

Get Best Price for 651737-69-8