Welcome to LookChem.com Sign In|Join Free

CAS

  • or

749921-33-3

Post Buying Request

749921-33-3 Suppliers

Recommended suppliersmore

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

749921-33-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 749921-33-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,4,9,9,2 and 1 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 749921-33:
(8*7)+(7*4)+(6*9)+(5*9)+(4*2)+(3*1)+(2*3)+(1*3)=203
203 % 10 = 3
So 749921-33-3 is a valid CAS Registry Number.

749921-33-3Relevant articles and documents

PROCESS FOR PRODUCING AMINO ACID DERIVATIVES

-

Page/Page column 57, (2008/06/13)

The present invention relates to a process for producing amino acid derivatives such as optically active β-amino acid in short steps with good yield and high optical purity, which comprises reacting a keto acid of the formula (1): wherein R1 is hydrogen, an optionally substituted hydrocarbon, etc.; R2 is a spacer; and R3 is an optionally substituted alkoxy, etc., or a salt thereof, with ammonia or an amine or a salt thereof in the presence of a chiral catalyst and in the presence or absence of an acid and/or a fluorine-containing alcohol, to give an amino acid derivative of the formula (2): wherein Q is a group formed by removing one hydrogen atom from ammonia or an amine; X' is an acid and/or a fluorine-containing alcohol; and b is 0 or 1.

METHOD FOR PRODUCING AN OPTICALLY ACTIVE TETRAHYDROQUINOLINE

-

Page 75,79-80, (2008/06/13)

The present invention provides an industrially advantageous production method of optically active tetrahydroquinolines of formula (1), which comprises: 1) a step of reacting a β-ketoester of formula (2) with an amine of formula (3) to produce an enaminoester of formula (4); 2) a step of subjecting the enaminoester of formula (4) above obtained in 1) to asymmetric hydrogenation to produce an optically active β-amino acid derivative of formula (5); 3) a step of amidating the optically active β-amino acid derivative (5) above obtained in 2) to produce an amide of formula (6); 4) step of alkoxycarbonylating the amide of formula (6) above obtained in 3) to produce a compound of formula (7); and 5) a step of subjecting the compound of formula (7) above to cyclization to produce the optically active tetrahydroquinoline of formula (1).

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 749921-33-3