81109-79-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81109-79-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,1,0 and 9 respectively; the second part has 2 digits, 7 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 81109-79:
(7*8)+(6*1)+(5*1)+(4*0)+(3*9)+(2*7)+(1*9)=117
117 % 10 = 7
So 81109-79-7 is a valid CAS Registry Number.
81109-79-7Relevant academic research and scientific papers
One-pot synthesis of spiro isochromane-3,3'-piperidines, -3,4'-piperidines and -3,3'-pyrrolidines
Butcher,Claremon
, p. 211 - 212 (2007/10/02)
Spiro isochromane-1-ones 1 were treated with lithium aluminum hydride or Grignard reagents to afford diol intermediates 2, which cyclize in 85% phosphoric acid at 100°C to spiro isochromanes 3 in 72-94% isolated yields.
