91040-20-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 91040-20-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,0,4 and 0 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 91040-20:
(7*9)+(6*1)+(5*0)+(4*4)+(3*0)+(2*2)+(1*0)=89
89 % 10 = 9
So 91040-20-9 is a valid CAS Registry Number.
91040-20-9Relevant articles and documents
Lactam Acetals: Part VIII - Further Investigation of Reactions with Araldehydes
Singh, Jujhar,Sardana, Vinod,Anand, Nitya
, p. 1079 - 1082 (2007/10/02)
o-Substituted araldehydes on reaction with 2,2-dimethoxy-1-methylpyrrolidine (1) first form dioxinopyrroles (2-6), which undergo facile hydrolysis to the (RR)-benzhydrols (7-11); the formation of 2-6 is particularly favoured with electron withdrawi
