134251-57-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 134251-57-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,4,2,5 and 1 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 134251-57:
(8*1)+(7*3)+(6*4)+(5*2)+(4*5)+(3*1)+(2*5)+(1*7)=103
103 % 10 = 3
So 134251-57-3 is a valid CAS Registry Number.
134251-57-3Relevant articles and documents
Palladium catalyzed couplings of enol triflates with alkynes under very mild conditions - The stereoselective synthesis of dienediynes from bis(enoltriflates)
Suffert,Bruckner
, p. 1453 - 1456 (2007/10/02)
The stereoselectivity accessible E-bis(enoltriflate) 6 couples under Pd(0)/CuI catalysis with two equiv. of alkyne giving E configuration dienediynes 7 with complete retention of stereochemistry.
