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42286-84-0

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42286-84-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 42286-84-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,2,8 and 6 respectively; the second part has 2 digits, 8 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 42286-84:
(7*4)+(6*2)+(5*2)+(4*8)+(3*6)+(2*8)+(1*4)=120
120 % 10 = 0
So 42286-84-0 is a valid CAS Registry Number.

42286-84-0SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 15, 2017

Revision Date: Aug 15, 2017

1.Identification

1.1 GHS Product identifier

Product name 5-methylchromen-2-one

1.2 Other means of identification

Product number -
Other names 5-Methyl-cumarin

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:42286-84-0 SDS

42286-84-0Downstream Products

42286-84-0Relevant articles and documents

Metal-free, Br?nsted acid-mediated synthesis of coumarin derivatives from phenols and propiolic acids

Choi, Hyuck,Kim, Jaehyun,Lee, Kooyeon

supporting information, p. 3600 - 3603 (2016/07/21)

A novel synthesis of coumarin derivatives by Br?nsted acid-mediated condensation and intramolecular cyclization of phenols and propiolic acids was reported. This transformation requires the use of TfOH in place of a conventional metal mediator, and it occurs under mild conditions and provides rapid access to coumarin derivatives in good yields.

Synthesis of coumarins by Pt-catalyzed hydroarylation of propiolic acids with phenols

Oyamada, Juzo,Kitamura, Tsugio

, p. 6918 - 6925 (2007/10/03)

Synthesis of coumarins from phenols and propiolic acids was examined by using a Pt catalyst such as PtCl2/AgOTf, K2PtCl4/AgOTf, and K2PtCl4/AgOAc. Propiolic acid reacted even with less reactive phenols in trifluoroacetic acid to give coumarins and dihydrocoumarins. In the case of substituted propiolic acids, phenylpropiolic acid and 2-octynoic acid, the reactions proceeded selectively to afford coumarins in good to high yields.

Enolethers, XVIII. - A Simple Synthesis of Coumarins

Ziegler, Thomas,Moehler, Hans,Effenberger, Franz

, p. 373 - 378 (2007/10/02)

In boiling 1,2-dichloroethane 3-ethoxyacryloyl chloride (1) reacts with phenols 2 to yield 3-ethoxyacrylates 3, which by treatment with conc. sulfuric acid/10percent SO3 cyclize to give coumarins 9 in good yields.The methoxy-substituted compounds 3d and 3k do not react to coumarins 9 with H2SO4/SO3 but with POCl3/H2O at room temperature.

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