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90490-46-3

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90490-46-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 90490-46-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,4,9 and 0 respectively; the second part has 2 digits, 4 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 90490-46:
(7*9)+(6*0)+(5*4)+(4*9)+(3*0)+(2*4)+(1*6)=133
133 % 10 = 3
So 90490-46-3 is a valid CAS Registry Number.

90490-46-3Downstream Products

90490-46-3Relevant articles and documents

Organphosphorus Compounds. XVIII. Synthesisi of 2-Phenyl-2,3-dihydro-1H-1,2-benzazaphosphole 2-Sulfide by Pyrolysis of (2-Aminobenzyl)phenyldithiophosphonic Acid

Collins, David J.,Drygala, Peter F.,Swan, John M.

, p. 2095 - 2110 (2007/10/02)

Reaction of 2-phthalimidobenzyl bromide (12b) with the dialkyl phenylphosphonites (13a-c) afforded the corresponding alkyl phosphinates (14a-c) which upon hydrazinolysis yielded the respective (2-aminobenzyl)phenylphosphinates (16a-c).Reduction of the phosphinates (16a) or (16b) with lithium aluminium hydride gave (2-aminobenzyl)phenylphosphine (15), characterized by its conversion into crystalline 2,3-diphenyl-1,2,3,4-tetrahydro-1,3-benzazaphosphorine (18). (2-Aminobenzyl)phenylphosphine (15) was heated with sulfur in benzene under reflux for 30 min to give 80percent of (2-aminobenzyl)phenyldithiophosphinic acid (20) which when heated between 100-200 deg in vacuum underwent elimination of hydrogen sulfide to yield 2-phenyl-2,3-dihydro-1H-1,2-benzazaphosphole 2-sulfide (22a).Several other new phosphorus compounds are described.An attempt to prepare a 1H-1,2-benzazaphosphole derivative by photolysis of methyl benzylphosphonic azide (7) was unsuccessful.

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