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1040384-56-2

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1040384-56-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1040384-56-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,4,0,3,8 and 4 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 1040384-56:
(9*1)+(8*0)+(7*4)+(6*0)+(5*3)+(4*8)+(3*4)+(2*5)+(1*6)=112
112 % 10 = 2
So 1040384-56-2 is a valid CAS Registry Number.

1040384-56-2Downstream Products

1040384-56-2Relevant articles and documents

Modular phosphite-oxazoline/oxazine ligand library for asymmetrie Pd-catalyzed allylic substitution reactions: scope and limitations - origin of enantioselectivity

Dieguez, Montserrat,Pamies, Oscar

experimental part, p. 3653 - 3669 (2009/04/23)

A library of phosphite-oxazoline/oxazine ligands L1-L15a-h has been synthesized and screened in the Pd-catalyzed allylic substitution reactions of several substrate types. These series of ligands can be prepared efficiently from easily accessible hydroxyl amino acid derivatives. Their modular nature enables the substituents/configurations in the oxazoline/oxazine moiety, alkyl backbone chain and in the biaryl phosphite moiety to be easily and systematically varied. By carefully selecting the ligand components, therefore, high regio- and enantioselectivities (ee values up to 99%) and good activities have been achieved in a broad range of mono- and disubstituted linear hindered and unhindered liner and cyclic substrates. The NMR studies on the Pd-π-allyl intermediates provide a deeper understanding about the effect of the ligand parameters on the origin of enantioselectivity. It also indicates that the nucleophilic attack takes place predominantly at the allylic terminal carbon atom located trans to the phosphite moiety.

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