220283-98-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 220283-98-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,0,2,8 and 3 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 220283-98:
(8*2)+(7*2)+(6*0)+(5*2)+(4*8)+(3*3)+(2*9)+(1*8)=107
107 % 10 = 7
So 220283-98-7 is a valid CAS Registry Number.
220283-98-7Relevant articles and documents
Stereospecific total synthesis of amberketal and a homologue
Kongkathip, Boonsong,Kongkathip, Ngampong,Janthorn, Sirinan,Virarangsiyakorn, Duangmanee
, p. 51 - 52 (1999)
Amberketal (1a) and acetal homologue (2a) have been synthesised from a commercially available methyl acetoacetate involving palladium catalysed cyclisation as a key step.