309756-04-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 309756-04-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,0,9,7,5 and 6 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 309756-04:
(8*3)+(7*0)+(6*9)+(5*7)+(4*5)+(3*6)+(2*0)+(1*4)=155
155 % 10 = 5
So 309756-04-5 is a valid CAS Registry Number.
309756-04-5Relevant articles and documents
Synthesis of 1,2-oxazaheterocycles containing an isoindolone moiety from N-hydroxyphthalimide
Bartovic,Decroix,Netchitailo
, p. 827 - 830 (2000)
Syntheses of the isoindolobenzoxazinone 1a and thienoxazinoisoindolones 1b,c was developed from N-hydroxyphthalimide 3 and halogenomethylaryl derivatives. The resulting aryloxy phthalimides 4a-c were reduced to hydroxylactams 5a-c which cyclized in acidic
