156418-33-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 156418-33-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,4,1 and 8 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 156418-33:
(8*1)+(7*5)+(6*6)+(5*4)+(4*1)+(3*8)+(2*3)+(1*3)=136
136 % 10 = 6
So 156418-33-6 is a valid CAS Registry Number.
156418-33-6Relevant articles and documents
Synthesis and reactions of 4,5-dihydro-4-oxo-pyrano [3,2-b]indole-3-carbaldehydes
Gorlitzer,Michels
, p. 106 - 115 (2007/10/02)
The title substances 3 are accessible following two reaction pathes, beginning with the 1,3-dicarbonyl compounds I. The 2-amino-3-carbaldehydes 15 are synthesized from the oximes II. The reaction of 3 with β-amino crotonic esters yields a mixture of the 1