136758-31-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 136758-31-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,6,7,5 and 8 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 136758-31:
(8*1)+(7*3)+(6*6)+(5*7)+(4*5)+(3*8)+(2*3)+(1*1)=151
151 % 10 = 1
So 136758-31-1 is a valid CAS Registry Number.
136758-31-1Relevant articles and documents
Use of Functionalised Ynamines in a Hetero-Diels-Alder Approach to Dihydronaphtholpyrans and Indenopyrans
Bloxham, Jason,Dell, Colin P.
, p. 3055 - 3060 (2007/10/02)
Reaction of the ynamine ester methyl 3-(pyrrolidin-1-yl)prop-2-ynoate 5 with 2-(4-nitrobenzylidene)-1-tetralone 1 results in a very poor yield of the chromatographically labile 4-aryl-5,6-dihydro-4H-naphtholpyran 8 along with the α-pyrone 10.Increa
