50743-17-4 Usage
Chemical Properties
light yellow crystalline powder
Uses
3-Cyanochromone may be used in the syntheses of following: 2-aminochromone-3-carboxamide3-amino-4H-chromeno[3,4-d]isoxazol-4-one 3-(diaminomethylene)chroman-2,4-dione functionalized novel spirobenzofuranones6H-bis-[1]-benzopyrano[2,3-b:3′,4′-e]pyridin-8(8H)ones and 3-(2′-hydroxybenzoyl)-5H-[1]benzopyrano[4,3-b]pyridine
Synthesis Reference(s)
The Journal of Organic Chemistry, 64, p. 8736, 1999 DOI: 10.1021/jo991031j
General Description
3-Cyanochromone (4-Oxo-4H-1-benzopyran-3-carbonitrile), a 3-substituted chromone, is a cyano substituted 1-benzopyran-4-one. It is an α,β-unsaturated nitrile and also an α,β-unsaturated ketone. Its molecule has electron deficiency at 3 sites i.e C (carbon) at second position, C of cyano and carbonyl group. 2-Amino-3-(alkyliminomethyl)chromones are obtained as major products during its reaction with aliphatic amines.
Check Digit Verification of cas no
The CAS Registry Mumber 50743-17-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,0,7,4 and 3 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 50743-17:
(7*5)+(6*0)+(5*7)+(4*4)+(3*3)+(2*1)+(1*7)=104
104 % 10 = 4
So 50743-17-4 is a valid CAS Registry Number.
InChI:InChI=1/C10H5NO2/c11-5-7-6-13-9-4-2-1-3-8(9)10(7)12/h1-4,6H
50743-17-4Relevant articles and documents
Studies on chromone derivatives: regioselective 1,3-dipolar and 1,4-cycloaddition reactions of 3-cyano-4H-1-benzopyran-4-thione
Sain, Bir,Prajapati, Dipak,Mahajan, Asha R,Sandhu, Jagir S
, p. 313 - 316 (2007/10/02)
1,3-Dipolar cycloaddition reactions of 3-cyano-4H-1-benzopyran-4-thione 1 with nitrilimines 3, nitrile oxides 7 and aldonitrones 8 yielded regioselective cycloadducts involving the thione function.In the latter two classes, the unstable cycloadducts fragmented to yield 3-cyanochromone 11 and isothiocyanate 12 or thioamide 13, respectively.In contrast, dienamines 14 preferred to react at the carbon-carbon double bond in a 1,4-cycloaddition yielding xanthione (9H-xanthene-9-thione) 16 by elimination of HCN and the amine moiety.Keywords: 1,3-dipolar cycloaddition / 1,4-cycloaddition / 4H-1-benzopyran-4-thione / nitrilimine / nitrile oxide / nitrone