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228869-36-1

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228869-36-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 228869-36-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,8,8,6 and 9 respectively; the second part has 2 digits, 3 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 228869-36:
(8*2)+(7*2)+(6*8)+(5*8)+(4*6)+(3*9)+(2*3)+(1*6)=181
181 % 10 = 1
So 228869-36-1 is a valid CAS Registry Number.

228869-36-1Relevant articles and documents

The synthesis and biological evaluation of a novel series of phthalazine PDE4 inhibitors I

Napoletano, Mauro,Norcini, Gabriele,Pellacini, Franco,Marchini, Francesco,Morazzoni, Gabriele,Ferlenga, Pierpaolo,Pradella, Lorenzo

, p. 2235 - 2238 (2000)

This communication describes the synthesis and in vitro evaluation of a novel and potent series of phosphodiesterase type IV (PDE4) inhibitors. The compounds described represent conformationally constrained analogues of RP 73401, Piclamilast. Preliminary evidences of reduced side effects of 11 compared to standards are also reported. (C) 2000 Elsevier Science Ltd.

Phthalazine derivatives as phosphodiesterase 4 inhibitors

-

Page column 19-20, (2010/11/30)

The present invention provides a compound selected from the group including: N-3-acetyl-1-(3,5-dichloropyridin-4-ylmethyl)-5-cyclopentyloxy-6-methoxy-4H-phthalazine; 6,7-dimethoxy-1-pyridin-4-ylmethyl-4-thiazol-2-yl-phthalazine; 1-(6,7-dimethoxy-4-pyridin-4-ylmethyl-1H-phthalazin-2-yl)ethanone; 2-methanesulphonyl-6,7-dimethoxy-4-pyridin-4-ylmethyl-1,2-dihydrophthalazine; 2-formyl-6,7-dimethoxy-4-pyridin-4-ylmethyl-1,2-dihydrophthalazine; 1-(6,7-dimethoxy-4-pyridin-4-ylmethyl-1H-phthalazin-2-yl)-1-imidazol-1-ylmethanone; 1-(3,5-dichloro-pyridin-4-ylmethyl)-3-methansulphonyl-6-difluoromethoxy-5-(tetrahydro-furan-2-yloxy)-4H-phthalazine; N→O derivatives thereof; and pharmaceutically acceptable salts thereof. The invention also provides a pharmaceutical composition, which contains a therapeutically effective amount of the above compound in admixture with a pharmaceutically acceptable carrier.

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