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243657-14-9

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243657-14-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 243657-14-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,4,3,6,5 and 7 respectively; the second part has 2 digits, 1 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 243657-14:
(8*2)+(7*4)+(6*3)+(5*6)+(4*5)+(3*7)+(2*1)+(1*4)=139
139 % 10 = 9
So 243657-14-9 is a valid CAS Registry Number.

243657-14-9Downstream Products

243657-14-9Relevant articles and documents

Photocleavable protecting groups as nucleobase protections allowed the solid-phase synthesis of base-sensitive SATE-prooligonucleotides

Alvarez, Karine,Vasseur, Jean-Jacques,Beltran, Thierry,Imbach, Jean-Louis

, p. 6319 - 6328 (2007/10/03)

The first synthesis of oligodeoxynucleotide heteropolymers carrying base-sensitive S-pivaloylthioethyl (t-Bu-SATE) phosphotriester linkages has been performed. It is based on the use of 6-nitroveratryloxycarbonyl (NVOC) and 2,2'-bis(2-nitrophenyl)ethoxycarbonyl (diNPEOC) groups as nucleobase protections in combination with photolysis deprotection. The synthesis was realized using the phosphoramidite approach on solid support bearing a 1-(o- nitrophenyl)-1,3-propanediol linker. The removal of the protecting groups and the cleavage of the oligonucleotides from the solid support were accomplished in a single photolysis procedure upon UV irradiation at wavelengths > 300 nm. Faster deprotection rates were observed for diNPEOC-protected nucleosides and oligomers than with NVOC-protected ones. The synthesis of pentanucleoside t- Bu-SATE-phosphotriesters d((5')TpCpCpCpTp(3')), d((5')TpApApApAp(3')), and d((5')TpGpGpGpTp(3')) and of dodecanucleoside t-Bu-SATE-phosphotriesters and -phosphorothioate d((5')ApCpApCpCpCpApApTpTpCpTp(3')) and d((5')ApGpApApTpTpGpGpGpTpGpTp(3')) demonstrated the efficiency of the method.

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