Welcome to LookChem.com Sign In|Join Free

CAS

  • or

148873-52-3

Post Buying Request

148873-52-3 Suppliers

Recommended suppliersmore

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

148873-52-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 148873-52-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,8,8,7 and 3 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 148873-52:
(8*1)+(7*4)+(6*8)+(5*8)+(4*7)+(3*3)+(2*5)+(1*2)=173
173 % 10 = 3
So 148873-52-3 is a valid CAS Registry Number.

148873-52-3Relevant articles and documents

SYNTHESES OF ENANTIOMERIC N-(3-HYDROXY-2-PHOSPHONOMETHOXYPROPYL)DERIVATIVES OF PURINE AND PYRIMIDINE BASES

Holy, Antonin

, p. 649 - 674 (2007/10/02)

Methods of preparation of N-(3-hydroxy-2-phosphonomethoxypropyl) (HPMP) derivatives of (2S)- and (2R)-configuration compounds I and XXVII, respectively are described.The general method starts from the corresponding N-(2,3-dihydroxypropyl) derivatives which were converted either into the (R)-enantiomers XIII by reaction of the base with (R)-glycidol butyrate (XII) in the presence of cesium carbonate and subsequent methanolysis, or into the (S)-enantiomers XI by alkylation of the base with (R)-2,2-dimethyl-4-tosyloxymethyl-1,3-dioxolane (V) in the presence of the same reagent.The amino groups on the heterocyclic base in compounds XI and XIII were benzoylated by silylation followed by reaction with benzoyl chloride and the obtained N-benzoates XV and XVII on reaction with trityl chloride afforded the corresponding 3'-O-trityl derivatives XVI and XVIII.These compounds were condensed with bis(2-propyl)-p-toluenesulfonyloxymethanephosphonate (XXIII) in dimethylformamide in the presence of sodium hydride to give the fully protected diesters XXIV and XXVIII.These compounds could be selectively acid-hydrolyzed to remove the trityl group only under formation of compounds XXXV, or methanolyzed and then acid-hydrolyzed to remove the trityl and N-benzoyl groups and lead to compounds XXVI and XXX, or treated with bromotrimethylsilane to remove the trityl and 2-propyl group to give phosphonates of the type XXVI.All the three types of compounds were then converted into free phosphonates of the (S)-series (I) and (R)-series (XXVII).Derivatives of cytosine (Ia, XXVIIa), adenine (Ib, XXVIIb), 2,6-diaminopurine (Ic, XXVIIc) and guanine (Id, XXVIId) were prepared.Condensation of the partially blocked adenine derivative XXXV with the tosyl derivative XXIII and subsequent deprotection afforded 9-(S)-(2,3-diphosphonomethoxypropyl)adenine (XLIII).Reaction of the same compound XXXV or its (R)-enantiomer XXXVIII with diethyl chlorophosphonate, followed by deblocking, afforded 3'-O-phosphoryl derivatives (S)-HPMPA (XXXVII) and (R)-HPMPA (XL).

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 148873-52-3