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138736-93-3

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138736-93-3 Usage

Chemical Properties

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Check Digit Verification of cas no

The CAS Registry Mumber 138736-93-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,7,3 and 6 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 138736-93:
(8*1)+(7*3)+(6*8)+(5*7)+(4*3)+(3*6)+(2*9)+(1*3)=163
163 % 10 = 3
So 138736-93-3 is a valid CAS Registry Number.

138736-93-3Relevant articles and documents

A Stereocontrolled Synthesis of a Phosphorothioate Cyclic Dinucleotide-Based STING Agonist

Kempson, James,Zhang, Huiping,Hou, Xiaoping,Cornelius, Lyndon,Zhao, Rulin,Wang, Bei,Hong, Zhenqiu,Oderinde, Martins S.,Pawluczyk, Joseph,Wu, Dauh-Rurng,Sun, Dawn,Li, Peng,Yip, Shiuhang,Smith, Aaron,Caceres-Cortes, Janet,Aulakh, Darpandeep,Sarjeant, Amy A.,Park, Peter K.,Harikrishnan, Lalgudi S.,Qin, Lan-Ying,Dodd, Dharmpal S.,Fink, Brian,Vite, Gregory,Mathur, Arvind

, p. 8851 - 8861 (2021/06/30)

We describe a stereodefined synthesis of the newly identified non-natural phosphorothioate cyclic dinucleotide (CDN) STING agonist, BMT-390025. The new route avoids the low-yielding racemic approach using P(III)-based reagents, and the stereospecific assembly of the phosphorothioate linkages are forged via the recently invented P(V)-based platform of the so-called PSI (Ψ) reagent system. This P(V) approach allows for the complete control of chirality of the P-based linkages and enabled conclusive evidence of the absolute configuration. The new approach offers robust procedures for preparing the stereodefined CDN in eight steps starting from advanced nucelosides, with late-stage direct drop isolations and telescoped steps enabling an efficient scale-up that proceeded in an overall 15% yield to produce multigram amounts of the CDN.

A novel approach toward the synthesis of chiral 2,3-dideoxy nucleosides and their carbocyclic analogues

Lee-Ruff,Wan,Jiang

, p. 2114 - 2118 (2007/10/02)

Photochemical ring-expansion of chiral 2(S),3(R)-bis [(benzoyloxy)methyl]cyclobutanone (3) in the presence of alcohols and acidic N-H functional groups gives anomeric mixtures of acetals and N-amino acetals, respectively, with retention of stereochemistry

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