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21991-31-1

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21991-31-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21991-31-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,9,9 and 1 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 21991-31:
(7*2)+(6*1)+(5*9)+(4*9)+(3*1)+(2*3)+(1*1)=111
111 % 10 = 1
So 21991-31-1 is a valid CAS Registry Number.

21991-31-1Relevant articles and documents

Cross β-alkylation of primary alcohols catalysed by DMF-stabilized iridium nanoparticles

Kobayashi, Masaki,Yamaguchi, Hiroki,Suzuki, Takeyuki,Obora, Yasushi

supporting information, p. 1950 - 1954 (2021/03/16)

A simple method for the cross β-alkylation of linear alcohols with benzyl alcohols in the presence of DMF-stabilized iridium nanoparticles was developed. The nanoparticles were prepared in one-step and thoroughly characterized. Furthermore, the optimum reaction conditions have a wide substrate scope and excellent product selectivity.

Functional Group Interconversion of Alkylidenemalononitriles to Primary Alcohols by a Cooperative Redox Operation

Emmetiere, Fabien,Grenning, Alexander J.

, p. 3077 - 3085 (2020/08/10)

Functional group interconversions are essential chemical processes enabling synthesis. In this report, we describe a strategy to convert alkylidenemalononitriles into primary alcohols in one step. The reaction relies on a choreographed redox process invol

SuperQuat, (S)-4-benzyl-5,5-dimethyl-oxazolidin-2-one for the asymmetric synthesis of α-substituted-aldehydes

Bull, Steven D.,Davies, Stephen G.,Nicholson, Rebecca L.,Sanganee, Hitesh J.,Smith, Andrew D.

, p. 3475 - 3479 (2007/10/03)

Reduction of α-substituted-(S)-N-acyl-4-benzyl-5,5-dimethyl-oxazolidin-2-ones with DIBAL-H in CH2Cl2 affords α-substituted aldehydes with no loss of stereochemical integrity at their α-centre. Copyright (C) 2000 Elsevier Science Ltd.

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