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4442-82-4

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4442-82-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4442-82-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,4,4 and 2 respectively; the second part has 2 digits, 8 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 4442-82:
(6*4)+(5*4)+(4*4)+(3*2)+(2*8)+(1*2)=84
84 % 10 = 4
So 4442-82-4 is a valid CAS Registry Number.

4442-82-4Relevant articles and documents

Asymmetric transfer hydrogenation of unsaturated ketones; factors influencing 1,4- vs 1,2- regio- and enantioselectivity, and alkene vs alkyne directing effects

Hall, Thomas H.,Adams, Hannah,Vyas, Vijyesh K.,Michael Chu,Wills, Martin

, (2020/12/07)

A detailed study has been completed on the asymmetric transfer hydrogenation (ATH) of a series of enones using Ru(II) catalysts. Electron-rich rings adjacent to the C[dbnd]O group reduce the level of C[dbnd]O reduction compared to C[dbnd]C. The ATH reaction can readily discriminate between double and triple bonds adjacent to ketones, reducing the double bond but leaving a triple bond intact in the major product.

Nickel-Catalyzed Stereoselective Arylboration of Unactivated Alkenes

Logan, Kaitlyn M.,Sardini, Stephen R.,White, Sean D.,Brown, M. Kevin

supporting information, p. 159 - 162 (2018/01/17)

A Ni-catalyzed method for arylboration is disclosed. The method allows for highly stereoselective arylboration of unactivated alkenes. The reactions utilize a simple Ni-catalyst and work with a broad range of alkenes and aryl bromides. The products represent useful intermediates for chemical synthesis due to the versatility of the C-B bond. Preliminary mechanistic details of the method are also disclosed.

Clean borrowing hydrogen methodology using hydrotalcite supported copper catalyst

Dixit, Manish,Mishra, Manish,Joshi, Pradyuman A.,Shah, Dinesh O.

, p. 80 - 83 (2013/05/09)

The catalytic activity of Mg-Al hydrotalcite supported copper catalyst was investigated for clean CC and CN bond forming reactions using alcohols as alkylating agent via borrowing hydrogen methodology. The catalyst showed excellent conversion of ketone and amine substrates (71-99%) to alkylated products with high selectivity in alkylation reactions.

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