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1309561-98-5

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1309561-98-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1309561-98-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,0,9,5,6 and 1 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1309561-98:
(9*1)+(8*3)+(7*0)+(6*9)+(5*5)+(4*6)+(3*1)+(2*9)+(1*8)=165
165 % 10 = 5
So 1309561-98-5 is a valid CAS Registry Number.

1309561-98-5Relevant articles and documents

Carbamoyl pyridone HIV-1 integrase inhibitors 3. A diastereomeric approach to chiral nonracemic tricyclic ring systems and the discovery of dolutegravir (S/GSK1349572) and (S/GSK1265744)

Johns, Brian A.,Kawasuji, Takashi,Weatherhead, Jason G.,Taishi, Teruhiko,Temelkoff, David P.,Yoshida, Hiroshi,Akiyama, Toshiyuki,Taoda, Yoshiyuki,Murai, Hitoshi,Kiyama, Ryuichi,Fuji, Masahiro,Tanimoto, Norihiko,Jeffrey, Jerry,Foster, Scott A.,Yoshinaga, Tomokazu,Seki, Takahiro,Kobayashi, Masanori,Sato, Akihiko,Johnson, Matthew N.,Garvey, Edward P.,Fujiwara, Tamio

, p. 5901 - 5916 (2013/08/23)

We report herein the discovery of the human immunodeficiency virus type-1 (HIV-1) integrase inhibitors dolutegravir (S/GSK1349572) (3) and S/GSK1265744 (4). These drugs stem from a series of carbamoyl pyridone analogues designed using a two-metal chelation model of the integrase catalytic active site. Structure-activity studies evolved a tricyclic series of carbamoyl pyridines that demonstrated properties indicative of once-daily dosing and superior potency against resistant viral strains. An inherent hemiaminal ring fusion stereocenter within the tricyclic carbamoyl pyridone scaffold led to a critical substrate controlled diastereoselective synthetic strategy whereby chiral information from small readily available amino alcohols was employed to control relative and absolute stereochemistry of the final drug candidates. Modest to extremely high levels of stereochemical control were observed depending on ring size and position of the stereocenter. This approach resulted in the discovery of 3 and 4, which are currently in clinical development.

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