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1178541-62-2

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1178541-62-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1178541-62-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,7,8,5,4 and 1 respectively; the second part has 2 digits, 6 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1178541-62:
(9*1)+(8*1)+(7*7)+(6*8)+(5*5)+(4*4)+(3*1)+(2*6)+(1*2)=172
172 % 10 = 2
So 1178541-62-2 is a valid CAS Registry Number.

1178541-62-2Upstream product

1178541-62-2Downstream Products

1178541-62-2Relevant articles and documents

Enantioselective Bronsted acid-catalyzed N-acyliminium cyclization cascades

Muratore, Michael E.,Holloway, Chloe A.,Pilling, Adam W.,Storer, R. Ian,Trevitt, Graham,Dixon, Darren J.

supporting information; experimental part, p. 10796 - 10797 (2009/12/03)

(Chemical Equation Presented) An enantioselective Bronsted acid-catalyzed N-acyliminium cyclization cascade of tryptamines with enol lactones to form architecturally complex heterocycles in high enantiomeric excess has been developed. The reaction is technically simple to perform as well as atom-efficient and may be coupled to a gold(I)-catalyzed cycloisomerization of alkynoic acids whereby the key enol lactone reaction partner is generated in situ. Employing up to 10 mol % bulky chiral phosphoric acid catalysts in boiling toluene allowed the product materials to be generated in good overall yields (63-99%) and high enantioselectivities (72-99% ee). With doubly substituted enol lactones, high diastereo- and enantioselectivities were obtained, thus providing a new example of a dynamic kinetic asymmetric cyclization reaction.

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