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540501-62-0

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540501-62-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 540501-62-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,4,0,5,0 and 1 respectively; the second part has 2 digits, 6 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 540501-62:
(8*5)+(7*4)+(6*0)+(5*5)+(4*0)+(3*1)+(2*6)+(1*2)=110
110 % 10 = 0
So 540501-62-0 is a valid CAS Registry Number.

540501-62-0Downstream Products

540501-62-0Relevant articles and documents

Design and synthesis of long-acting inhibitors of dipeptidyl peptidase IV

Kondo, Takashi,Sugimoto, Isamu,Nekado, Takahiro,Ochi, Kenya,Ohtani, Tazumi,Tajima, Yohei,Yamamoto, Susumu,Kawabata, Kazuhito,Nakai, Hisao,Toda, Masaaki

, p. 2715 - 2735 (2008/02/08)

A series of (4-substituted prolyl)prolinenitriles were synthesized and evaluated as inhibitors of dipeptidylpeptidase IV (DPP-IV). Among those tested, the 4β-[4-(hydroxyphenyl)prolyl]prolinenitriles showed a potent inhibitory activity with a long duration

Asymmetric hydrogenations for the synthesis of boc-protected 4-alkylprolinols and prolines

Del Valle, Juan R.,Goodman, Murray

, p. 3923 - 3931 (2007/10/03)

The utility of 4-substituted prolinols and their corresponding prolines in peptides, peptidomimetics, and natural products has motivated researchers to find new and efficient routes for their preparation. Herein, we report a general approach to the synthesis of Boc-protected 4-alkylprolinols and prolines via a divergent asymmetric hydrogenation strategy. Intermediate exocyclic olefins were prepared by Wittig-type reactions with ketone 6 and subjected to hydroxyl and sterically directed reductions. The Crabtree catalyst (Ir[COD] PyPCy3PF6) proved to be highly effective in diastereoselective hydrogenations to give trans- substituted pyrrolidines (9). Good facial selectivities were also observed in heterogeneous hydrogenations with Raney-nickel to obtain cis-substituted pyrrolidines (11). Employing this strategy, we describe the synthesis of novel prolinol and proline-based building blocks for incorporation into biologically relevant peptidomimetics.

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