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74531-03-6

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74531-03-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 74531-03-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,5,3 and 1 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 74531-03:
(7*7)+(6*4)+(5*5)+(4*3)+(3*1)+(2*0)+(1*3)=116
116 % 10 = 6
So 74531-03-6 is a valid CAS Registry Number.

74531-03-6Relevant articles and documents

Syntheses with α-Metalated Isocyanides, XLV. - Reactions of α-Metalated Isocyanides with Some 1,3-Dipoles

Schoellkopf, Ulrich,Lau, Hans-Hermann,Scheunemann, Karl-Heinz,Blume, Ernst,Madawinata, Kusuma

, p. 600 - 610 (2007/10/02)

Reaction of α-metalated isocyanides 1a-c, f with alkylideneamine oxides (nitrones) 4 affords the 2-imidazolidinones 8.The 6-metalated 2,3-dihydro-4H-1,2,5-oxadiazine of type 5 is postulated as decisive intermediate. - Benzonitrile oxide (17) reacts analogously with 1a and 1b to give 4-imidazolin-2-ones 18 and with 1e to give the 3-imidazolin-2-one 19. - Phenyl azide (20) reacts with two moles of 1b to give 5-(benzylidenamino)-4H,5H-1,2,3-triazoline 24.The reaction course is discussed.

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