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145336-42-1

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145336-42-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 145336-42-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,5,3,3 and 6 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 145336-42:
(8*1)+(7*4)+(6*5)+(5*3)+(4*3)+(3*6)+(2*4)+(1*2)=121
121 % 10 = 1
So 145336-42-1 is a valid CAS Registry Number.

145336-42-1Upstream product

145336-42-1Downstream Products

145336-42-1Relevant articles and documents

Cyclic Oligophosphonic Anhydrides Stable in Aqueous Media

Alferiev, Ivan S.,Bobkov, Sergey Yu.

, p. 1213 - 1224 (2007/10/02)

Depending on reaction conditions, the phosphonylation of N-alkylacetamides with H3PO3-PCl3 in B*HCl media (B = Py, Bu3N) gives either 1-alkylaminoethylidene-1,1-bis-phosphonic acids (1a-e) or previously unknown 1-alkylaminobutane-1,1,3,3-tetrayl-tetrakisphosphonic dianhydrides (2a-e).The latter convert into monocyclic forms (3a-e) under mild acidic hydrolysis.Acyclic forms (4a-e) cannot be isolated.In the presence of higher N,N-dilakylamides the phosphonylation of acetamides affords the higher dianhydrides (2f-h).Strong acidic hydrolysis of 2 or 3 yields 3,3-diphosphonocarboxylic acids (5a-c).Reacting with H3PO3-PHal3 in B*HHal (Hal = Cl, Br), the amides R1CONHR2 (R H, Me; R2 = Alk, H)give both N-alkyl- (or N-unsubstituted) 1-aminoalkylidene-1,1-bis-phosphonic scids (6a-j) and their cyclic dimeric anhydrides (7a-g, i, j). Key words: Amides; phosphonylation; 1-aminoalkane-1,1,3,3-tetrayl-tetrakis-phosphonic anhydrides; cyclic dimeric anhydrides; 1-aminoalkylidene-1,1-bis-phosphonic acids.

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