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133444-83-4

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133444-83-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 133444-83-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,4,4 and 4 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 133444-83:
(8*1)+(7*3)+(6*3)+(5*4)+(4*4)+(3*4)+(2*8)+(1*3)=114
114 % 10 = 4
So 133444-83-4 is a valid CAS Registry Number.

133444-83-4Relevant articles and documents

α-Amino Aldehydes as Readily Available Chiral Aldehydes for Rh-Catalyzed Alkyne Hydroacylation

Hooper, Joel F.,Seo, Sangwon,Truscott, Fiona R.,Neuhaus, James D.,Willis, Michael C.

, p. 1630 - 1634 (2016)

Readily available α-amino aldehydes, incorporating a methylthiomethyl (MTM) protecting group on nitrogen, are shown to be efficient substrates in Rh-catalyzed alkyne hydroacylation reactions. The reactions are performed under mild conditions, employing a small-bite-angle bis-phosphine ligand, allowing for good functional group tolerance with high stereospecificity. Amino aldehydes derived from glycine, alanine, valine, leucine, phenylalanine, isoleucine, serine, tryptophan, methionine, and cysteine were successfully employed, as was an enantiomerically enriched α-OMTM-aldehyde derived from phenyllactic acid. The synthetic utility of the α-amino enone products is demonstrated in a short enantioselective synthesis of the natural product sphingosine.

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