85559-25-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 85559-25-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,5,5,5 and 9 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 85559-25:
(7*8)+(6*5)+(5*5)+(4*5)+(3*9)+(2*2)+(1*5)=167
167 % 10 = 7
So 85559-25-7 is a valid CAS Registry Number.
85559-25-7Relevant articles and documents
TOTAL SYNTHESIS OF CATALPALACTONE
Marx, John N.,Dobrowolski, Paul J.
, p. 4457 - 4460 (1982)
The first synthesis of catalpalactone (1) is reported.The key steps are the coupling of the selenenylated lactone 8 with bromophthalide (9) and the selenoxide elimination of 14 to give catalpalactone with very high regioselectivity.
