77887-46-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 77887-46-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,8,8 and 7 respectively; the second part has 2 digits, 4 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 77887-46:
(7*7)+(6*7)+(5*8)+(4*8)+(3*7)+(2*4)+(1*6)=198
198 % 10 = 8
So 77887-46-8 is a valid CAS Registry Number.
77887-46-8Relevant articles and documents
TOTAL SYNTHESIS OF CATALPALACTONE
Marx, John N.,Dobrowolski, Paul J.
, p. 4457 - 4460 (2007/10/02)
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.
