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213841-85-1

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213841-85-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 213841-85-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,3,8,4 and 1 respectively; the second part has 2 digits, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 213841-85:
(8*2)+(7*1)+(6*3)+(5*8)+(4*4)+(3*1)+(2*8)+(1*5)=121
121 % 10 = 1
So 213841-85-1 is a valid CAS Registry Number.

213841-85-1Relevant articles and documents

Chiral Lewis Acid-Mediated Enantioselective Pictet-Spengler Reaction of Nb-Hydroxytryptamine with Aldehydes

Yamada, Hideki,Kawate, Tomohiko,Matsumizu, Miyako,Nishida, Atsushi,Yamaguchi, Kentaro,Nakagawa, Masako

, p. 6348 - 6354 (2007/10/03)

The first example of a reagent-controlled enantioselective Pictet-Spengler reaction is demonstrated. Using diisopinocampheylchloroborane as a chiral Lewis acid catalyst, the Pictet-Spengler reaction of Nb-hydroxytryptamine with aldehydes gave the corresponding 2-hydroxytetrahydro-β-carbolines in up to 90% ee. The enantioselective Pictet-Spengler reaction catalyzed by chiral binaphthol-derived Br?nsted acid-assisted Lewis acids, with up to 91% ee, is also demonstrated.

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