Welcome to LookChem.com Sign In|Join Free

CAS

  • or

216249-59-1

Post Buying Request

216249-59-1 Suppliers

Recommended suppliersmore

  • Product
  • FOB Price
  • Min.Order
  • Supply Ability
  • Supplier
  • Contact Supplier

216249-59-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 216249-59-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,6,2,4 and 9 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 216249-59:
(8*2)+(7*1)+(6*6)+(5*2)+(4*4)+(3*9)+(2*5)+(1*9)=131
131 % 10 = 1
So 216249-59-1 is a valid CAS Registry Number.

216249-59-1Relevant articles and documents

PREPARATION OF (S)-CLOPIDOGREL AND RELATED COMPOUNDS

-

Page/Page column 6-7, (2010/02/09)

A process for producing enantiomerically enriched (S)-α-(2-chlorophenyl)-6,7-dihydrothieno[3,2-c]pyridine-5(4H)-acetic acid hydrocarbyl ester, represented by the formula: Is provided, wherein R1 and R2 are hydrogens and R3 is methyl (i.e., (S)-Clopidogrel). The process includes the steps of: (a) contacting N-2-chlorobenz-aldehyde-ylidene-1-ethylamine-2(2-thiophenyl)imine and an HCN source, in the presence of a non-metallic asymmetric Strecker catalyst to form enantiomerically enriched (S)-α,α-(2-thiophenylethylamino)(2-chlorophenyl)acetonitrile; (b) contacting the enantiomerically enriched (S)-α,α-(2-thiophenylethylamino)(2-chlorophenyl)acetonitrile and a formaldehyde equivalent, in the presence of an acid catalyst to form enantiomerically enriched α-5(4,5,6,7-tetrahydro[3,2-c]thienopyridyl)(2-chlorobenzyl)-nitrile; and (c) contacting the enantiomerically enriched α-5(4,5,6,7-tetrahydro[3,2-c]thienopyridyl)(2-chlorobenzyl)-nitrile and a reagent capable of converting a cyano group into an ester group to form enantiomerically enriched hydrocarbyl ester of (S)-α-(2-chlorophenyl)-6,7-dihydrothieno-[3,2-c]pyridine-5(4H)-acetic acid.

Post a RFQ

Enter 15 to 2000 letters.Word count: 0 letters

Attach files(File Format: Jpeg, Jpg, Gif, Png, PDF, PPT, Zip, Rar,Word or Excel Maximum File Size: 3MB)

1

What can I do for you?
Get Best Price

Get Best Price for 216249-59-1