133338-91-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 133338-91-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,3,3 and 8 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 133338-91:
(8*1)+(7*3)+(6*3)+(5*3)+(4*3)+(3*8)+(2*9)+(1*1)=117
117 % 10 = 7
So 133338-91-7 is a valid CAS Registry Number.
133338-91-7Relevant academic research and scientific papers
2-Diazo-1,3-dimesityl-2H-indene and 1,3-Dimesitylisoindenylidene
Jones, David W.,Pomfret, Alan
, p. 249 - 253 (2007/10/02)
Reduction of 1,3-dihydroxy-1,3-dimesitylindan-2-one oxime 5 with HI-HOAc gives the primary enamine, 2-amino-1,3-dimesitylindene 7.This resists hydrolysis to 1,3-dimesitylindan-2-one 6 even with boiling concentrated HCl-dioxane (1:1); steric protection of
