91075-21-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 91075-21-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,0,7 and 5 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 91075-21:
(7*9)+(6*1)+(5*0)+(4*7)+(3*5)+(2*2)+(1*1)=117
117 % 10 = 7
So 91075-21-7 is a valid CAS Registry Number.
91075-21-7Relevant articles and documents
191. Hetero-Cope-Umlagerungen 4. Mitteilung Regiokontrollierte Indolsynthesen
Blechert, Siegfried
, p. 1835 - 1843 (2007/10/02)
The reaction of O-deprotoneted N-phenylhydroxylamines 1 with various electron-deficient allenes 2, 14, 16 gives, via Michael addition and Cope-rearrangement, substituted anilines 5, which are easily convertible into indoles 6.In this manner, sulfoxides 17
