257887-63-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 257887-63-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,7,8,8 and 7 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 257887-63:
(8*2)+(7*5)+(6*7)+(5*8)+(4*8)+(3*7)+(2*6)+(1*3)=201
201 % 10 = 1
So 257887-63-1 is a valid CAS Registry Number.
257887-63-1Relevant articles and documents
A highly efficient synthesis of triisopropylsilyldifluorobromopropyne yields a versatile gem-difluoromethylene building block
Wang, ZhiGang,Hammond, Gerald B.
, p. 2545 - 2546 (1999)
Triisopropylsilyldifluorobromopropyne, readily prepared in excellent yield from the reaction of lithium triisopropylsilylacetylide with CF2Br2, provides a convenient entry into a functionalized CF2 synthon.