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16821-33-3

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16821-33-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 16821-33-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,6,8,2 and 1 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 16821-33:
(7*1)+(6*6)+(5*8)+(4*2)+(3*1)+(2*3)+(1*3)=103
103 % 10 = 3
So 16821-33-3 is a valid CAS Registry Number.

16821-33-3Downstream Products

16821-33-3Relevant articles and documents

CONTROLLING BENZYLIC FUNCTIONALITY AND STEREOCHEMISTRY: 2. SYNTHESIS OF THE PSEUDOPTEROSIN AGLYCONE

McCombie, Stuart W.,Cox, Brian,Ganguly, Ashit K.

, p. 2087 - 2090 (1991)

Homologation, cyclisation, and reduction converted the tetralin (2) to the hexahydrophenalenol (8), which was methylated to afford (19) via alkoxide-directed metallation.The degree of stereoselectivity resulting from reactions of (19) and congeners with allylsilane - Lewis acid combinations was markedly dependent upon substitution patterns, whereas Et2AlCN-SnCl4 produced pseudoaxial nitriles.The trimethyl nitrile (24) was elaborated to the pseudopterosin aglycone (4).

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