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21803-90-7

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21803-90-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21803-90-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,8,0 and 3 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 21803-90:
(7*2)+(6*1)+(5*8)+(4*0)+(3*3)+(2*9)+(1*0)=87
87 % 10 = 7
So 21803-90-7 is a valid CAS Registry Number.

21803-90-7Relevant articles and documents

Multi-gram preparation of cinnamoyl tryptamines as skin whitening agents through a chemo-enzymatic flow process

Padrosa, David Roura,Contente, Martina L.

, (2021/11/18)

A 2-step flow-based chemo-enzymatic synthesis of selected cinnamoyl tryptamines as potential cosmetic ingredients has been developed. A first reaction catalyzed by immobilized Pd(OAc)2 gave the acyl donors employed as starting material in the s

METHOD FOR SYNTHESISING AMIDES

-

Page/Page column 32-34, (2018/03/06)

The present invention relates to a method for synthesising amides that is of general applicability. The method may be performed in vitro or in vivo. Cell lines for use in the in vivo methods also form aspects of the invention. The method for synthesising a non-natural amide comprises: a. reaction of a carboxylic acid with a naturally occurring CoA ligase or a variant thereof; and b. reaction of the product of step a with an amine in the presence of a naturally occurring acyltransferase or a variant thereof; with the proviso that where the CoA ligase and acyltransferase are both naturally occurring, they are not derived from the same source species and do not act sequentially in a metabolic pathway; and with the proviso that the non-natural product is not N-(E)-p-coumaroyl-3-hydroxyanthranilic acid or N-(E)-p-caffeoyl-3-hydroxyanthranilic acid. Further, a method for producing an active pharmaceutical ingredient by the aforementioned method and host cells for carrying out said methods are envisaged.

Catalytic amide formation with α′-hydroxyenones as acylating reagents

Chiang, Pei-Chen,Kim, Yoonjoo,Bode, Jeffrey W.

supporting information; experimental part, p. 4566 - 4568 (2010/01/06)

α′-Hydroxyenones undergo clean, catalytic amidations with amines promoted by the combination of an N-heterocyclic carbene and 1,2,4-triazole. The Royal Society of Chemistry 2009.

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