80446-57-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 80446-57-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,0,4,4 and 6 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 80446-57:
(7*8)+(6*0)+(5*4)+(4*4)+(3*6)+(2*5)+(1*7)=127
127 % 10 = 7
So 80446-57-7 is a valid CAS Registry Number.
80446-57-7Relevant articles and documents
SYNTHESIS OF 1-OXA ANALOGUES OF NATURALLY OCCURRING CEPHALOSPORINS AND CEPHAMYCINS
Sendo, Yuji,Konoike, Toshiro,Murakami, Masayuki,Yoshioka, Mitsuru
, p. 599 - 603 (2007/10/02)
The title compounds 15a-c and 16a-c were synthesized from a 3-exomethylene-1-oxacepham compound 4.Its chlorohydroxylation provided a key intermediate 5e in synthesis of the 3'-oxygen-functionalized 1-oxacephems.
