Welcome to LookChem.com Sign In|Join Free

CAS

  • or

4442-83-5

Post Buying Request

4442-83-5 Suppliers

Recommended suppliersmore

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

4442-83-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4442-83-5 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 3 respectively.
Calculate Digit Verification of CAS Registry Number 4442-83:
(6*4)+(5*4)+(4*4)+(3*2)+(2*8)+(1*3)=85
85 % 10 = 5
So 4442-83-5 is a valid CAS Registry Number.

4442-83-5Relevant articles and documents

Regiodivergent Hydroborative Ring Opening of Epoxides via Selective C-O Bond Activation

Magre, Marc,Paffenholz, Eva,Maity, Bholanath,Cavallo, Luigi,Rueping, Magnus

supporting information, p. 14286 - 14294 (2020/09/15)

A magnesium-catalyzed regiodivergent C-O bond cleavage protocol is presented. Readily available magnesium catalysts achieve the selective hydroboration of a wide range of epoxides and oxetanes yielding secondary and tertiary alcohols in excellent yields and regioselectivities. Experimental mechanistic investigations and DFT calculations provide insight into the unexpected regiodivergence and explain the different mechanisms of the C-O bond activation and product formation.

Visible-Light-Mediated Anti-Markovnikov Hydration of Olefins

Hu, Xia,Zhang, Guoting,Bu, Faxiang,Lei, Aiwen

, p. 1432 - 1437 (2017/08/09)

Considering that stoichiometric borane and oxidant are required in the classical alkene anti-Markovnikov hydration process, it remains appealing to achieve the transformation in a catalytic protocol. Herein, a visible-light-mediated anti-Markovnikov addition of water to alkenes by using an organic photoredox catalyst in conjunction with a redox-active hydrogen atom donor was developed, which avoided the need for a transition-metal catalyst, stoichiometric borane, as well as oxidant. Both terminal and internal olefins are readily accommodated in this transformation to obtain corresponding primary and secondary alcohols in good yields with single regioselectivity. This procedure can be scaled up to gram scale with a 230 turnover number based on photocatalyst.

Remarkable Change of the Diastereoselection in the Dye-Sensitized Ene Hydroperoxidation of Chiral Alkenes by Zeolite Confinement

Stratakis, Manolis,Kalaitzakis, Dimitris,Stavroulakis, Dimitris,Kosmas, Giannis,Tsangarakis, Constantinos

, p. 3471 - 3474 (2007/10/03)

(Equation presented) The ene reaction of singlet oxygen with chiral trisubstituted alkenes bearing an alkyl and a phenyl group at the stereogenic center is erythro diastereoselective in solution and threo diastereoselective if carried out within zeolite Na-Y. The change of the diastereoselection trend by zeolite confinement is attributed to a synergism of steric effects and cation-π interactions.

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 4442-83-5