71837-42-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 71837-42-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,8,3 and 7 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 71837-42:
(7*7)+(6*1)+(5*8)+(4*3)+(3*7)+(2*4)+(1*2)=138
138 % 10 = 8
So 71837-42-8 is a valid CAS Registry Number.
71837-42-8Relevant articles and documents
NOVEL REDUCTION OF α-BROMO-α,β-UNSATURATED KETONES. SELECTIVE SYNTHESIS OF β,γ-UNSATURATED KETONES
Hirao, Toshikazu,Masunaga, Toshio,Hayashi, Ken-ichiro,Ohshiro, Yoshiki,Agawa, Toshio
, p. 399 - 400 (2007/10/02)
Treatment of α-bromo-α,β-unsaturated ketones or 1,1-dibromo-2-trimethylsiloxycyclopropanes with diethyl phosphite and triethylamine affords β,γ-unsaturated ketones selectively.