145842-81-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 145842-81-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,5,8,4 and 2 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 145842-81:
(8*1)+(7*4)+(6*5)+(5*8)+(4*4)+(3*2)+(2*8)+(1*1)=145
145 % 10 = 5
So 145842-81-5 is a valid CAS Registry Number.
145842-81-5Relevant articles and documents
Synthesis of 17-(isocyanotosylmethylene) steroids: precursors to pregnane derivatives
Leusen, Daan van,Leusen, Albert M. van
, p. 393 - 401 (2007/10/02)
The synthesis is described of a series of twenty 17-(isocyanotosylmethylene) steroids 5 from 17-oxo steroids and 4-tolylsulfonylmethyl isocyanide (TosMIC).Furthermore, nine analogous 17-(isocyanosulfonylmethylene) steroids (15-21a) have been prepared usin
