167751-21-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 167751-21-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,7,7,5 and 1 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 167751-21:
(8*1)+(7*6)+(6*7)+(5*7)+(4*5)+(3*1)+(2*2)+(1*1)=155
155 % 10 = 5
So 167751-21-5 is a valid CAS Registry Number.
167751-21-5Relevant articles and documents
Intramolecular Carbometallation of Organozinc Reagents
Meyer, Christophe,Marek, Ilane,Courtemanche, Gilles,Normant, Jean-F.
, p. 11665 - 11692 (1994)
The intramolecular cyclization reaction of primary or secondary alkenylzincs leads to a cyclopentylmethylzinc derivatives in a totally regiospecific 5-exo-trig cyclization in the presence of a highly sensitive function.
