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CAS

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637779-45-4

O-(4-methoxybenzoyl)-N-tosyl-(L)-allo-threonine is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

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  • 637779-45-4 Structure

  • Basic information

    1. Product Name: O-(4-methoxybenzoyl)-N-tosyl-(L)-allo-threonine
    2. Synonyms: O-(4-methoxybenzoyl)-N-tosyl-(L)-allo-threonine
    3. CAS NO:637779-45-4
    4. Molecular Formula:
    5. Molecular Weight: 407.444
    6. EINECS: N/A
    7. Product Categories: N/A
    8. Mol File: 637779-45-4.mol

  • Chemical Properties

    1. Melting Point: N/A
    2. Boiling Point: N/A
    3. Flash Point: N/A
    4. Appearance: N/A
    5. Density: N/A
    6. Refractive Index: N/A
    7. Storage Temp.: N/A
    8. Solubility: N/A
    9. CAS DataBase Reference: O-(4-methoxybenzoyl)-N-tosyl-(L)-allo-threonine(CAS DataBase Reference)
    10. NIST Chemistry Reference: O-(4-methoxybenzoyl)-N-tosyl-(L)-allo-threonine(637779-45-4)
    11. EPA Substance Registry System: O-(4-methoxybenzoyl)-N-tosyl-(L)-allo-threonine(637779-45-4)

  • Safety Data

    1. Hazard Codes: N/A
    2. Statements: N/A
    3. Safety Statements: N/A
    4. WGK Germany:
    5. RTECS:
    6. HazardClass: N/A
    7. PackingGroup: N/A
    8. Hazardous Substances Data: 637779-45-4(Hazardous Substances Data)

637779-45-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 637779-45-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,7,7,7 and 9 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 637779-45:
(8*6)+(7*3)+(6*7)+(5*7)+(4*7)+(3*9)+(2*4)+(1*5)=214
214 % 10 = 4
So 637779-45-4 is a valid CAS Registry Number.

637779-45-4Downstream Products

637779-45-4Relevant articles and documents

Enantioselective Lewis Acid-Catalyzed Mukaiyama-Michael Reactions of Acyclic Enones. Catalysis by allo-Threonine-Derived Oxazaborolidinones

Wang, Xiaowei,Adachi, Shinya,Iwai, Hiroyoshi,Takatsuki, Hiroshi,Fujita, Katsuhiro,Kubo, Mikako,Oku, Akira,Harada, Toshiro

, p. 10046 - 10057 (2007/10/03)

allo-Threonine-derived O-aroyl-B-phenyl-N-tosyl-1,3,2 -oxazaborolidin-5-ones 1g,n catalyze the asymmetric Mukaiyama-Michael reaction of acyclic enones with a trimethylsilyl ketene S,O-acetal in high enantioselectivity. A range of alkenyl methyl ketones is successfully employed as Michael acceptors affording ee values of 85-90% by using 10 mol % of the catalyst. The use of 2,6-diisopropylphenol and tert-butyl methyl ether as additives is found to be essential to achieve high enantioselectivity in these reactions. The effects of the additives are discussed in terms of the retardation of an Si+-catalyzed racemic pathway, which seriously deteriorates the enantioselectivity of asymmetric Mukaiyama-Michael reactions. A working model for asymmetric induction is proposed based on correlation between catalyst structures and enantioselectivities.

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